Question

15.6×13.6-14.6×3.1-3.1的简便计算（快点）

15.6×13.6-14.6×3.1-3.1的简便计算（快点）

Answer 1

15.6×13.6-14.6×3.1-3.1
=15.6x13.6-(14.6x3.1+3.1)
=15.6x13.6-(14.6+1)x3.1
=15.6x13.6-15.6x3.1
=15.6x(13.6-3.1)
=15.6x10.5
=15.6x10+15.6x0.5
=156+7.8
=163.8

供参考。