Question

78×27+27×23-71的简便运算怎么做？

Answer 1

27（78+23）-71
=27（100+1）-71
=2700+27-71
=2656

Answer 2

78×27+27×23-71
=27x(78+23)-71
=27x(100+1)-71
=27x100 +27-71
=2700 -44
=2656

Answer 3

27×（78+23）-71

Answer 4

27×（78+22+1）-71
=27×（78+22）+27×1-71
=27×100-44
=2656

Answer 5

这道题的简便计算方法是：78*27+27*23-71=27（78+23）-71=27*101-71=2700+27-71=2700-44=2656。