2.28×3.1+7.9×7.28-7.28用简便算法计算
答案:2 悬赏:40 手机版
解决时间 2021-04-04 11:49
- 提问者网友：黑米和小志
- 2021-04-03 13:16
2.28×3.1+7.9×7.28-7.28用简便算法计算
最佳答案
- 五星知识达人网友：青尢
- 2021-04-03 14:01
2.28×3.1+7.9×7.28-7.28
=2.28X3.1+7.28X(7.9-1)
=2.28X3.1+7.28X6.9
=2.28X3.1+2.28X6.9+5X6.9
=2.28X(3.1+6.9)+34.5
=2.28X10+34.5
=22.8+34.5
=57.3
=2.28X3.1+7.28X(7.9-1)
=2.28X3.1+7.28X6.9
=2.28X3.1+2.28X6.9+5X6.9
=2.28X(3.1+6.9)+34.5
=2.28X10+34.5
=22.8+34.5
=57.3
全部回答
- 1楼网友：爱难随人意
- 2021-04-03 14:36
=7.28x(3.1+7.9-1)
=7.28x10
=72.8
=7.28x10
=72.8
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