题目内容
| 简便计算并写出过程. ①125×32×25 | ②132×77+22×132+132 |
| ③1139-(350+139) | ④1170÷9÷13. |
①125×32×25,
=125×8×4×25,
=(125×8)×(4×25),
=1000×100,
=100000;
②132×77+22×132+132,
=132×(77+22+1),
=132×100,
=13200;
③1139-(350+139),
=1139-350-139,
=1139-139-350,
=1000-350,
=650;
④1170÷9÷13,
=1170÷(9×13),
=1170÷117,
=10.
=125×8×4×25,
=(125×8)×(4×25),
=1000×100,
=100000;
②132×77+22×132+132,
=132×(77+22+1),
=132×100,
=13200;
③1139-(350+139),
=1139-350-139,
=1139-139-350,
=1000-350,
=650;
④1170÷9÷13,
=1170÷(9×13),
=1170÷117,
=10.
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