题目内容
下面各题,怎样简便就怎样算.
10÷(
+
)×
(
+
)÷
×
9.6×57+430×0.96
+11.5+
-1.5.
10÷(
| 1 |
| 3 |
| 3 |
| 4 |
| 13 |
| 36 |
(
| 4 |
| 5 |
| 1 |
| 4 |
| 3 |
| 10 |
| 10 |
| 3 |
9.6×57+430×0.96
| 3 |
| 4 |
| 1 |
| 4 |
考点:整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:(1)先算加法,再算除法,最后算乘法;
(2)先算加法,再算除法,最后算乘法;
(3)根据乘法分配律进行简算;
(4)根据加法交换律和结合律进行简算.
(2)先算加法,再算除法,最后算乘法;
(3)根据乘法分配律进行简算;
(4)根据加法交换律和结合律进行简算.
解答:
解:(1)10÷(
+
)×
=10÷
×
=
×
=
;
(2)(
+
)÷
×
=
÷
×
=
×
=
;
(3)9.6×57+430×0.96
=9.6×57+43×9.6
=9.6×(57+43)
=9.6×100
=960;
(4)
+11.5+
-1.5
=(
+
)+(11.5-1.5)
=1+10
=11.
| 1 |
| 3 |
| 3 |
| 4 |
| 13 |
| 36 |
=10÷
| 13 |
| 12 |
| 13 |
| 36 |
=
| 120 |
| 13 |
| 13 |
| 36 |
=
| 10 |
| 3 |
(2)(
| 4 |
| 5 |
| 1 |
| 4 |
| 3 |
| 10 |
| 10 |
| 3 |
=
| 21 |
| 20 |
| 3 |
| 10 |
| 10 |
| 3 |
=
| 7 |
| 2 |
| 10 |
| 3 |
=
| 35 |
| 3 |
(3)9.6×57+430×0.96
=9.6×57+43×9.6
=9.6×(57+43)
=9.6×100
=960;
(4)
| 3 |
| 4 |
| 1 |
| 4 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
=1+10
=11.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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