题目内容
| 用简便方法计算. 28×25 | 132+(265+68) | 210÷35 | 295-153-47. |
(1)28×25,
=4×7×25,
=(25×4)×7,
=100×7,
=700;
(2)132+(265+68),
=(132+68)+265,
=200+265,
=465;
(3)210÷35,
=210÷(7×5),
=(210÷7)÷5,
=30÷5
=6;
(4)295-153-47
=295-(153+47),
=295-200
=95.
=4×7×25,
=(25×4)×7,
=100×7,
=700;
(2)132+(265+68),
=(132+68)+265,
=200+265,
=465;
(3)210÷35,
=210÷(7×5),
=(210÷7)÷5,
=30÷5
=6;
(4)295-153-47
=295-(153+47),
=295-200
=95.
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