题目内容
(
+
)×29×23=
÷7+
×
=
,
1.56÷[32×(1-
)+3.6]=
| 2 |
| 29 |
| 3 |
| 23 |
133
133
,| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
| 2 |
| 13 |
| 2 |
| 13 |
1.56÷[32×(1-
| 5 |
| 8 |
0.1
0.1
.分析:(1)(2)利用乘法分配律进行简算,(3)利用四则混合运算的顺序解答即可.
解答:解:(1)(
+
)×29×23,
=
×29×23+
× 29×23,
=46+87,
=133;
(2)
÷7+
×
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(3)1.56÷[32×(1-
)+3.6],
=1.56÷[32×
+3.6],
=1.56÷[12+3.6],
=1.56÷15.6,
=0.1.
| 2 |
| 29 |
| 3 |
| 23 |
=
| 2 |
| 29 |
| 3 |
| 23 |
=46+87,
=133;
(2)
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 6 |
| 13 |
=(
| 8 |
| 13 |
| 6 |
| 13 |
| 1 |
| 7 |
=
| 14 |
| 13 |
| 1 |
| 7 |
=
| 2 |
| 13 |
(3)1.56÷[32×(1-
| 5 |
| 8 |
=1.56÷[32×
| 3 |
| 8 |
=1.56÷[12+3.6],
=1.56÷15.6,
=0.1.
点评:考查学生四则运算的顺序及学生运用简便算法的能力.
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