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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)÷214;(6)(−3)×56×(−45)×(
题目详情
计算下列各题
(1)(5-6)-(7-9); (2)(−4
)−(+5
)−(−4
)
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
)
(5)(-81)÷2
; (6)(−3)×
×(−
)×(−
)
(7)(1-
+
)×(-48); (8)-1
÷
×(-0.2)×(-
)
(−4
)−(+5
)−(−4
)
(3)22+(-4)+(-2)+4; (4)(-8)+(+0.25)-(-9)+(-
)
(5)(-81)÷2
; (6)(−3)×
×(−
)×(−
)
(7)(1-
+
)×(-48); (8)-1
÷
×(-0.2)×(-
)
1 1 4 4
1 1 3 3
1 1 4 4
)
(5)(-81)÷2
; (6)(−3)×
×(−
)×(−
)
(7)(1-
+
)×(-48); (8)-1
÷
×(-0.2)×(-
)
1 1 4 4
2
; (6)(−3)×
×(−
)×(−
)
(7)(1-
+
)×(-48); (8)-1
÷
×(-0.2)×(-
)
1 1 4 4 (−3)×
×(−
)×(−
)
(7)(1-
+
)×(-48); (8)-1
÷
×(-0.2)×(-
)
5 5 6 6
4 4 5 5
1 1 4 4
+
)×(-48); (8)-1
÷
×(-0.2)×(-
)
1 1 6 6
)×(-48); (8)-1
÷
×(-0.2)×(-
)
3 3 4 4
÷
×(-0.2)×(-
)
1 1 2 2
×(-0.2)×(-
)
3 3 4 4
)
5 5 2 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 |
2 |
3 |
4 |
5 |
2 |
3 |
4 |
5 |
2 |
5 |
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. (−4
1 1 14 4 4)−(+5
1 1 13 3 3)−(−4
1 1 14 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 1 14 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 1 13 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 1 14 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 1 14 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 1 14 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 1 13 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 1 13 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 1 14 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 1 14 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 9 94 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 4 49 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 5 56 6 6×(−
4 4 45 5 5)×(−
1 1 14 4 4)
=-3×
×
×
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
5 5 56 6 6×
4 4 45 5 5×
1 1 14 4 4
=-
;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 1 12 2 2;
(7)(1-
+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 1 16 6 6+
)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 3 34 4 4)×(-48)
=1×(-48)-
×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 1 16 6 6×(-48)+
×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 3 34 4 4×(-48)
=-48+8-36
=-84+8
=-(84-8)
=-76;
(8)-1
÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
1 1 12 2 2÷
×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 3 34 4 4×(-0.2)×(-
)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
5 5 52 2 2)
=-
×
×(-
)×(-
)
=-
×
×
×
=-1.
3 3 32 2 2×
×(-
)×(-
)
=-
×
×
×
=-1.
4 4 43 3 3×(-
)×(-
)
=-
×
×
×
=-1.
1 1 15 5 5)×(-
)
=-
×
×
×
=-1.
5 5 52 2 2)
=-
×
×
×
=-1.
3 3 32 2 2×
×
×
=-1.
4 4 43 3 3×
×
=-1.
1 1 15 5 5×
=-1.
5 5 52 2 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
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 |
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
3 |
4 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
4 |
3 |
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
5 |
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
5 |
2 |
=-
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
3 |
2 |
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
4 |
3 |
1 |
5 |
5 |
2 |
=-1.
1 |
5 |
5 |
2 |
=-1.
5 |
2 |
=-1.
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