题目内容
用简便方法计算
| 48+89+52 | 45×14 | 14×12×5 |
(1)48+89+52,
=48+52+89,
=100+89,
=189;
(2)45×14,
=45×2×7,
=90×7,
=630;
(3)14×12×5,
=14×(12×5),
=14×60,
=840.
=48+52+89,
=100+89,
=189;
(2)45×14,
=45×2×7,
=90×7,
=630;
(3)14×12×5,
=14×(12×5),
=14×60,
=840.
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