题目内容
用简便方法计算.
| 37+125+63+175 | 75×56-56×28 | 8×(29×l25) | 156×l0l-156. |
37+125+63+175,
=(37+63)+(125+175),
=100+300,
=400;
75×56-56×28,
=(75-28)×56,
=43×56,
=2408;
8×(29×l25),
=29×(8×125),
=29×1000,
=29000;
156×l0l-156,
=156×(101×1),
=156×100,
=15600.
=(37+63)+(125+175),
=100+300,
=400;
75×56-56×28,
=(75-28)×56,
=43×56,
=2408;
8×(29×l25),
=29×(8×125),
=29×1000,
=29000;
156×l0l-156,
=156×(101×1),
=156×100,
=15600.
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