题目内容
| 计算下面各题,能简算得要简算. 5.3-3
| 47.5×0.25+
| ||||||||||||
| 10.2÷[28×(1-
|
①5.3-3
+4.7-3
,
=(5.3+4.7)-(3
+3
),
=10-7,
=3;
②47.5×0.25+
×52.5,
=47.5×0.25+0.25×52.5,
=0.25×(47.5+52.5),
=0.25×100,
=25;
③
+(
+
)×
,
=
+
×
,
=
+
,
=
;
④10.2÷[28×(1-
)+
],
=10.2÷[28×
+
],
=
÷
,
=
.
| 4 |
| 5 |
| 1 |
| 5 |
=(5.3+4.7)-(3
| 4 |
| 5 |
| 1 |
| 5 |
=10-7,
=3;
②47.5×0.25+
| 1 |
| 4 |
=47.5×0.25+0.25×52.5,
=0.25×(47.5+52.5),
=0.25×100,
=25;
③
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 4 |
| 5 |
=
| 2 |
| 3 |
| 5 |
| 6 |
| 4 |
| 5 |
=
| 2 |
| 3 |
| 2 |
| 3 |
=
| 4 |
| 3 |
④10.2÷[28×(1-
| 1 |
| 7 |
| 3 |
| 2 |
=10.2÷[28×
| 6 |
| 7 |
| 3 |
| 2 |
=
| 51 |
| 5 |
| 51 |
| 2 |
=
| 2 |
| 5 |
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