题目内容
计算:
÷190%+
×
+1.9.
| 88 |
| 10 |
| 22 |
| 10 |
| 10 |
| 19 |
分析:把190%和1.9化为
,并把除法转化为乘法,运用乘法分配律简算.
| 19 |
| 10 |
解答:解:
÷190%+
×
+1.9,
=
÷
+
×
+
,
=
×
+
×
+
,
=(
+
)×
+
,
=11×
+
,
=
+
,
=
.
| 88 |
| 10 |
| 22 |
| 10 |
| 10 |
| 19 |
=
| 88 |
| 10 |
| 19 |
| 10 |
| 22 |
| 10 |
| 10 |
| 19 |
| 19 |
| 10 |
=
| 88 |
| 10 |
| 10 |
| 19 |
| 22 |
| 10 |
| 10 |
| 19 |
| 19 |
| 10 |
=(
| 88 |
| 10 |
| 22 |
| 10 |
| 10 |
| 19 |
| 19 |
| 10 |
=11×
| 10 |
| 19 |
| 19 |
| 10 |
=
| 110 |
| 19 |
| 19 |
| 10 |
=
| 1461 |
| 190 |
点评:此题考查了分数的简算,主要运用了乘法分配律.
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