题目内容
(1)45的一半乘
与
的和,积是多少?
(2)250的8%比一个数的3倍正好少3.2,这个数应该是多少?
| 2 |
| 9 |
| 1 |
| 3 |
(2)250的8%比一个数的3倍正好少3.2,这个数应该是多少?
(1)45×
×(
+
),
=45×
×
+45×
×
,
=5+7.5,
=12.5;
答:积是12.5.
(2)(3.2+250×8%)÷3,
=(3.2+20)÷3,
=23.2÷3,
=
;
答:这个数应该是
.
| 1 |
| 2 |
| 2 |
| 9 |
| 1 |
| 3 |
=45×
| 1 |
| 2 |
| 2 |
| 9 |
| 1 |
| 2 |
| 1 |
| 3 |
=5+7.5,
=12.5;
答:积是12.5.
(2)(3.2+250×8%)÷3,
=(3.2+20)÷3,
=23.2÷3,
=
| 116 |
| 15 |
答:这个数应该是
| 116 |
| 15 |
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