题目内容
简便计算.
| 她yy×口.47×y.口2v | 口y2×2.v. |
(1)800×9.11×0.125,
=(800×0.125)×9.11,
=100×9.11,
=911;
(2)102×2.5,
=(100+2)×2.5,
=100×2.5+2×2.5,
=250+5,
=255.
=(800×0.125)×9.11,
=100×9.11,
=911;
(2)102×2.5,
=(100+2)×2.5,
=100×2.5+2×2.5,
=250+5,
=255.
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