脱式计算，能简算的简算:8.56-1.56x0.5、1.25x3.2x2.5
答案:2 悬赏:80 手机版
解决时间 2021-04-02 23:38
- 提问者网友：刺鸟
- 2021-04-02 15:16
脱式计算，能简算的简算:8.56-1.56x0.5、1.25x3.2x2.5
最佳答案
- 五星知识达人网友：荒野風
- 2021-04-02 16:44
8.56-1.56x0.5
=7+1.56-1.56x0.5
=7+1.56x(1-0.5)
=7+1.56x0.5
=7+0.78
=7.78
1.25x3.2x2.5
=1.25x(8x0.4)x2.5
=(1.25x8)x(0.4x2.5)
=10x1
=10
=7+1.56-1.56x0.5
=7+1.56x(1-0.5)
=7+1.56x0.5
=7+0.78
=7.78
1.25x3.2x2.5
=1.25x(8x0.4)x2.5
=(1.25x8)x(0.4x2.5)
=10x1
=10
全部回答
- 1楼网友：duile
- 2021-04-02 17:33
8.56-1.56x0.5
=8.56x0.5-1.56x0.5+8.56x0.5
=7x0.5+8.56x0.5
=15.56×0.5
=7.78追答1.25x3.2x2.5
=1.25x8x(0.4x2.5)
=10x1
=10
=8.56x0.5-1.56x0.5+8.56x0.5
=7x0.5+8.56x0.5
=15.56×0.5
=7.78追答1.25x3.2x2.5
=1.25x8x(0.4x2.5)
=10x1
=10
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