7.86-(5.63+0.86)-1.37简便算法
问题描述:
7.86-(5.63+0.86)-1.37简便算法
答
7.86-(5.63+0.86)-1.37
= 7.86 - 5.63 - 0.86 - 1.37
= (7.86 - 0.86) - (5.63 + 1.37)
= 7 - 7
= 0