7.86-(5.63+0.86)-1.37简便算法

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7.86-(5.63+0.86)-1.37简便算法7.86-(5.63+0.86)-1.37简便算法7.86-(5.63+0.86)-1.37简便算法7.86-(5.63+0.86)-1.37=7.8

7.86-(5.63+0.86)-1.37简便算法
7.86-(5.63+0.86)-1.37简便算法

7.86-(5.63+0.86)-1.37简便算法
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

7.86-0.86-(5.63+1.37)=7-7=0

7.86-(5.63+0.86)-1.37
=7.86-0.86-(5.63+1.37)
=7-7
=0