题目内容
计算:
×98+
×100
17-17×
.
| 5 |
| 8 |
| 3 |
| 8 |
17-17×
| 17 |
| 18 |
考点:分数的简便计算
专题:运算定律及简算
分析:(1)首先把
×100分成
×98+
×2,然后根据乘法分配律简算即可;
(2)根据乘法分配律简算即可.
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
(2)根据乘法分配律简算即可.
解答:
解:(1)
×98+
×100
=
×98+
×98+
×2
=(
+
)×98+
=98+
=98
(2)17-17×
=17×(1-
)
=17×
=
| 5 |
| 8 |
| 3 |
| 8 |
=
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 4 |
=98+
| 3 |
| 4 |
=98
| 3 |
| 4 |
(2)17-17×
| 17 |
| 18 |
=17×(1-
| 17 |
| 18 |
=17×
| 1 |
| 18 |
=
| 17 |
| 18 |
点评:此题主要考查了根据乘法分配律简算的能力.
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