题目内容
| 用简便方法计算下面各题 25×1.25×32 | 73.8×16-7.38×60 | 1.25+
|
(1)25×1.25×32,
=25×1.25×4×8,
=(25×4)×(1.25×8),
=100×10,
=1000;
(2)73.8×16-7.38×60,
=7.38×160-7.38×60,
=7.38×(160-60);
=7.38×100,
=738;
(3)1.25+
×0.4+125%÷
,
=1.25+1.25×0.4+1.25×1.6,
=1.25×(1+0.4+1.6),
=1.25×3,
=3.75.
=25×1.25×4×8,
=(25×4)×(1.25×8),
=100×10,
=1000;
(2)73.8×16-7.38×60,
=7.38×160-7.38×60,
=7.38×(160-60);
=7.38×100,
=738;
(3)1.25+
| 5 |
| 4 |
| 5 |
| 8 |
=1.25+1.25×0.4+1.25×1.6,
=1.25×(1+0.4+1.6),
=1.25×3,
=3.75.
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