题目内容
有简便的用简便运算
|
16×
|
(
|
分析:(1)利用除法法则计算;
(2)(3)利用乘法分配律简算.
(2)(3)利用乘法分配律简算.
解答:解:(1)
÷
=
×
=
;
(2)16×
+
×16
=16×(
+
)
=16×1
=16;
(3)(
+
)×88
=
×88+
×88
=55+24
=79.
| 15 |
| 16 |
| 3 |
| 4 |
=
| 15 |
| 16 |
| 4 |
| 3 |
=
| 5 |
| 4 |
(2)16×
| 2 |
| 7 |
| 5 |
| 7 |
=16×(
| 2 |
| 7 |
| 5 |
| 7 |
=16×1
=16;
(3)(
| 5 |
| 8 |
| 3 |
| 11 |
=
| 5 |
| 8 |
| 3 |
| 11 |
=55+24
=79.
点评:此题考查分数除法的计算方法以及乘法分配律在分数中的推广运用.
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