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计算:(1)1−47+15−37+95(2)−534−[−1.5−(4.5−434)](3)−24×(−12+34−13)(4)18×(−23)+13×23−4×23(5)−112×(13−1)÷|−113|(6)−14÷(−52)×(−53)+|0.8−1|.
题目详情
计算:
(1)1−
+
−
+
(2)−5
−[−1.5−(4.5−4
)]
(3)−24×(−
+
−
)
(4)18×(−
)+13×
−4×
(5)−1
×(
−1)÷|−
|
(6)−14÷(−52)×(−
)+|0.8−1|.
1−
+
−
+
(2)−5
−[−1.5−(4.5−4
)]
(3)−24×(−
+
−
)
(4)18×(−
)+13×
−4×
(5)−1
×(
−1)÷|−
|
(6)−14÷(−52)×(−
)+|0.8−1|.
4 4 7 7
1 1 5 5
3 3 7 7
9 9 5 5
−5
−[−1.5−(4.5−4
)]
(3)−24×(−
+
−
)
(4)18×(−
)+13×
−4×
(5)−1
×(
−1)÷|−
|
(6)−14÷(−52)×(−
)+|0.8−1|.
3 3 4 4
3 3 4 4
−24×(−
+
−
)
(4)18×(−
)+13×
−4×
(5)−1
×(
−1)÷|−
|
(6)−14÷(−52)×(−
)+|0.8−1|.
1 1 2 2
3 3 4 4
1 1 3 3
18×(−
)+13×
−4×
(5)−1
×(
−1)÷|−
|
(6)−14÷(−52)×(−
)+|0.8−1|.
2 2 3 3
2 2 3 3
2 2 3 3
−1
×(
−1)÷|−
|
(6)−14÷(−52)×(−
)+|0.8−1|.
1 1 2 2
1 1 3 3
1 1 13 13
−14÷(−52)×(−
)+|0.8−1|.14÷(−52)×(−
)+|0.8−1|.14÷(−52)×(−
)+|0.8−1|.4÷(−52)×(−
)+|0.8−1|.52)×(−
)+|0.8−1|.52)×(−
)+|0.8−1|.2)×(−
)+|0.8−1|.
5 5 3 3
(1)1−
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
(2)−5
| 3 |
| 4 |
| 3 |
| 4 |
(3)−24×(−
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
(4)18×(−
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
(5)−1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
(6)−14÷(−52)×(−
| 5 |
| 3 |
1−
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
(2)−5
| 3 |
| 4 |
| 3 |
| 4 |
(3)−24×(−
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
(4)18×(−
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
(5)−1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
(6)−14÷(−52)×(−
| 5 |
| 3 |
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
−5
| 3 |
| 4 |
| 3 |
| 4 |
(3)−24×(−
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
(4)18×(−
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
(5)−1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
(6)−14÷(−52)×(−
| 5 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
−24×(−
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
(4)18×(−
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
(5)−1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
(6)−14÷(−52)×(−
| 5 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
18×(−
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
(5)−1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
(6)−14÷(−52)×(−
| 5 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
−1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
(6)−14÷(−52)×(−
| 5 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
−14÷(−52)×(−
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
▼优质解答
答案和解析
(1)1-
+
-
+
=1-
-
+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
4 4 47 7 7+
-
+
=1-
-
+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 15 5 5-
+
=1-
-
+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 37 7 7+
=1-
-
+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
9 9 95 5 5
=1-
-
+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
4 4 47 7 7-
+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 37 7 7+
+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
9 9 95 5 5+
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 15 5 5
=1-1+2
=2;
(2)-5
-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4-[-1.5-(4.5-4
)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4)]
=-5
-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4-(-1.5-4.5+4
)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4)
=-5
+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4+1.5+4.5-4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4
=-10.5+6
=-4.5;
(3)-24×(-
+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 12 2 2+
-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4-
)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 13 3 3)
=-
×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 12 2 2×(-24)+
×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
3 3 34 4 4×(-24)-
×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 13 3 3×(-24)
=12-18+8
=20-18
=2;
(4)18×(-
)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
2 2 23 3 3)+13×
-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
2 2 23 3 3-4×
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
2 2 23 3 3
=
×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
2 2 23 3 3×(-18+13-4)
=
×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
2 2 23 3 3×(-9)
=-6;
(5)-1
×(
-1)÷|-
|
=-
×(-
1 1 12 2 2×(
-1)÷|-
|
=-
×(-
1 1 13 3 3-1)÷|-
|
=-
×(-
1 1 113 13 13|
=-
×(-
3 3 32 2 2×(-
2 2 2
举报
问题解析 问题解析
(1)根据加法交换律与结合律,把同分母分数相加减即可;
(2)先去小括号,再去中括号,然后利用加法交换律与结合律进行计算即可得解;
(3)利用乘法分配律进行计算即可得解;
(4)逆运用乘法分配律进行计算即可得解;
(5)把带分数化为假分数,再根据有理数混合运算顺序,先算括号里面的,再按照从左到右的顺序把除法转化为乘法,然后计算即可得解;
(6)根据有理数的混合运算顺序,先算乘方,再算乘除,最后算加减. (1)根据加法交换律与结合律,把同分母分数相加减即可;
(2)先去小括号,再去中括号,然后利用加法交换律与结合律进行计算即可得解;
(3)利用乘法分配律进行计算即可得解;
(4)逆运用乘法分配律进行计算即可得解;
(5)把带分数化为假分数,再根据有理数混合运算顺序,先算括号里面的,再按照从左到右的顺序把除法转化为乘法,然后计算即可得解;
(6)根据有理数的混合运算顺序,先算乘方,再算乘除,最后算加减.名师点评 名师点评
本题考点: 本题考点:
有理数的混合运算. 有理数的混合运算.
考点点评: 考点点评:
本题考查了有理数混合运算的顺序,先乘除后加减,有括号的先算括号里面的,计算过程中注意正负符号的变化,能利用运算定律的利用运算定律使运算更加简便. 本题考查了有理数混合运算的顺序,先乘除后加减,有括号的先算括号里面的,计算过程中注意正负符号的变化,能利用运算定律的利用运算定律使运算更加简便.
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| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
=1-
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
=1-
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
=1-
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 7 |
| 9 |
| 5 |
=1-
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 9 |
| 5 |
=1-
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 7 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 9 |
| 5 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 5 |
=1-1+2
=2;
(2)-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
=-5
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
=-10.5+6
=-4.5;
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 3 |
=-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 3 |
=12-18+8
=20-18
=2;
(4)18×(-
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 2 |
| 3 |
=
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 2 |
| 3 |
=-6;
(5)-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 3 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 1 |
| 13 |
=-
| 3 |
| 2 |
| 2 |
| 3 |
| 2 |
| 2 |
| 2 |
作业帮用户
2017-10-19
举报
作业帮用户作业帮用户
2017-10-192017-10-19
举报
- 问题解析
- (1)根据加法交换律与结合律,把同分母分数相加减即可;
(2)先去小括号,再去中括号,然后利用加法交换律与结合律进行计算即可得解;
(3)利用乘法分配律进行计算即可得解;
(4)逆运用乘法分配律进行计算即可得解;
(5)把带分数化为假分数,再根据有理数混合运算顺序,先算括号里面的,再按照从左到右的顺序把除法转化为乘法,然后计算即可得解;
(6)根据有理数的混合运算顺序,先算乘方,再算乘除,最后算加减.
(2)先去小括号,再去中括号,然后利用加法交换律与结合律进行计算即可得解;
(3)利用乘法分配律进行计算即可得解;
(4)逆运用乘法分配律进行计算即可得解;
(5)把带分数化为假分数,再根据有理数混合运算顺序,先算括号里面的,再按照从左到右的顺序把除法转化为乘法,然后计算即可得解;
(6)根据有理数的混合运算顺序,先算乘方,再算乘除,最后算加减.
(2)先去小括号,再去中括号,然后利用加法交换律与结合律进行计算即可得解;
(3)利用乘法分配律进行计算即可得解;
(4)逆运用乘法分配律进行计算即可得解;
(5)把带分数化为假分数,再根据有理数混合运算顺序,先算括号里面的,再按照从左到右的顺序把除法转化为乘法,然后计算即可得解;
(6)根据有理数的混合运算顺序,先算乘方,再算乘除,最后算加减.
- 名师点评
-
- 本题考点:
- 有理数的混合运算.
-
- 考点点评:
- 本题考查了有理数混合运算的顺序,先乘除后加减,有括号的先算括号里面的,计算过程中注意正负符号的变化,能利用运算定律的利用运算定律使运算更加简便.
- 本题考点:
- 有理数的混合运算.
- 本题考点:
- 有理数的混合运算.
- 考点点评:
- 本题考查了有理数混合运算的顺序,先乘除后加减,有括号的先算括号里面的,计算过程中注意正负符号的变化,能利用运算定律的利用运算定律使运算更加简便.
- 考点点评:
- 本题考查了有理数混合运算的顺序,先乘除后加减,有括号的先算括号里面的,计算过程中注意正负符号的变化,能利用运算定律的利用运算定律使运算更加简便.
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