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计算下列各题(1)(5-6)-(7-9);(2)(-414)-(+513)-(-414)(3)22+(-4)+(-2)+4;(4)(-8)+(+0.25)-(-9)+(-14)(5)(-81)÷
题目详情
计算下列各题 (1)(5-6)-(7-9); (2) (-4
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
(5)(-81)÷ 2
(7)(1-
|
(1)(5-6)-(7-9); (2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
(5)(-81)÷ 2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
(1)(5-6)-(7-9); (2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
(5)(-81)÷ 2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
(1)(5-6)-(7-9); (2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
(5)(-81)÷ 2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
(1)(5-6)-(7-9); (2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
(5)(-81)÷ 2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
(-4
1 |
4 |
1 |
3 |
1 |
4 |
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
(5)(-81)÷ 2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
1 |
4 |
1 |
3 |
1 |
4 |
1 |
4 |
(5)(-81)÷ 2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
1 |
4 |
2
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
1 |
4 |
5 |
6 |
4 |
5 |
1 |
4 |
(7)(1-
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
5 |
6 |
4 |
5 |
1 |
4 |
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
1 |
6 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
3 |
4 |
1 |
2 |
3 |
4 |
5 |
2 |
1 |
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2 |
▼优质解答
答案和解析
(1)(5-6)-(7-9)
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
)-(+5
)-(-4
)
=(-4
)-5
+4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. (1)(5-6)-(7-9)
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
)-(+5
)-(-4
)
=(-4
)-5
+4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. (1)(5-6)-(7-9)
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
)-(+5
)-(-4
)
=(-4
)-5
+4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. (1)(5-6)-(7-9)
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
)-(+5
)-(-4
)
=(-4
)-5
+4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. (-4
1 4 1 1 1 4 4 4 )-(+5
1 3 1 1 1 3 3 3 )-(-4
1 4 1 1 1 4 4 4 )
=(-4
)-5
+4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 4 1 1 1 4 4 4 )-5
+4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 3 1 1 1 3 3 3 +4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 4 1 1 1 4 4 4
=(-4
)+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 4 1 1 1 4 4 4 )+4
-5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 4 1 1 1 4 4 4 -5
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 3 1 1 1 3 3 3
=-5
;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 3 1 1 1 3 3 3 ;
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
)
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 4 1 1 1 4 4 4 )
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. 2
1 4 1 1 1 4 4 4
=(-81) ÷
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. ÷
9 4 9 9 9 4 4 4
=(-81)×
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
4 9 4 4 4 9 9 9
=-36;
(6) (-3)×
×(-
)×(-
)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1. (-3)×
5 6 5 5 5 6 6 6 ×(-
4 5 4 4 4 5 5 5 )×(-
1 4 1 1 1 4 4 4 )
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
5 6 5 5 5 6 6 6 ×
4 5 4 4 4 5 5 5 ×
1 4 1 1 1 4 4 4
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 2 1 1 1 2 2 2 ;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 6 1 1 1 6 6 6 +
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 4 3 3 3 4 4 4 )×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 6 1 1 1 6 6 6 ×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 4 3 3 3 4 4 4 ×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 2 1 1 1 2 2 2 ÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 4 3 3 3 4 4 4 ×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
5 2 5 5 5 2 2 2 )
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 2 3 3 3 2 2 2 ×
×(-
)×(-
)
=-
×
×
×
=-1.
4 3 4 4 4 3 3 3 ×(-
)×(-
)
=-
×
×
×
=-1.
1 5 1 1 1 5 5 5 )×(-
)
=-
×
×
×
=-1.
5 2 5 5 5 2 2 2 )
=-
×
×
×
=-1.
3 2 3 3 3 2 2 2 ×
×
×
=-1.
4 3 4 4 4 3 3 3 ×
×
=-1.
1 5 1 1 1 5 5 5 ×
=-1.
5 2 5 5 5 2 2 2
=-1.
(1)(5-6)-(7-9) =[5+(-6)]-[7+(-9)] =-1-(-2) =-1+2 =1; (2) (-4
=(-4
=(-4
=-5
(3)22+(-4)+(-2)+4 =(22+4)+[(-4)+(-2)] =26+(-6) =20; (4)(-8)+(+0.25)-(-9)+(-
=(-8)+(+0.25)+9+(-0.25) =(-8)+9+[(+0.25)+(-0.25)] =1+0 =1; (5)(-81)÷ 2
=(-81) ÷
=(-81)×
=-36; (6) (-3)×
=-3×
=-
(7)(1-
=1×(-48)-
=-48+8-36 =-84+8 =-(84-8) =-76; (8)-1
=-
=-
=-1. |
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
=[5+(-6)]-[7+(-9)]
=-1-(-2)
=-1+2
=1;
(2) (-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1. (-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
4 |
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
3 |
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
4 |
=(-4
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
4 |
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
4 |
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
3 |
=-5
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
3 |
(3)22+(-4)+(-2)+4
=(22+4)+[(-4)+(-2)]
=26+(-6)
=20;
(4)(-8)+(+0.25)-(-9)+(-
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
4 |
=(-8)+(+0.25)+9+(-0.25)
=(-8)+9+[(+0.25)+(-0.25)]
=1+0
=1;
(5)(-81)÷ 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1. 2
1 |
4 |
=(-81) ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1. ÷
9 |
4 |
=(-81)×
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
4 |
9 |
=-36;
(6) (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1. (-3)×
5 |
6 |
4 |
5 |
1 |
4 |
=-3×
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
5 |
6 |
4 |
5 |
1 |
4 |
=-
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
2 |
(7)(1-
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
6 |
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
3 |
4 |
=1×(-48)-
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
6 |
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
1 |
2 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
3 |
4 |
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
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