数学简便计算.能简便算的简便在线等.1/3×2+2/3÷1/24×0.8×12.5×0.2529×17/28

分类: 作业答案 • 2021-12-19 16:47:45

问题描述：

数学简便计算.能简便算的简便在线等.
1/3×2+2/3÷1/2
4×0.8×12.5×0.25
29×17/28

答

1/3×2+2/3÷1/2
=1/3×2+2/3×2
=2×(1/3+2/3)
=2
4×0.8×12.5×0.25
=4×0.25×0.8×12.5
=1×10
=10
29×17/28
=（28+1）×17/28
=28×17/28+17/28
=17+17/28
=17又17/28