Question

0.375×16.6+6.25×1.65的简便计算

Answer 1

0.375×16.6+6.25×1.65
=0.375×10×1.66+6.25×1.65
=3.75×1.66+6.25×1.65
=3.75×(1.65+0.01) + 6.25×1.65
=3.75×1.65+3.75×0.01+6.25×1.65
=1.65×(3.75+6.25)+0.0375
=1.65×10+0.0375
=16.5 + 0.0375
=16.5375

Answer 2

0.375X16.6十6.25X1.65
0.375X（16.5十0.1）十6.25X1.65
二3.75X1.65十0.IX0.375十6.25X1.65
=1.65×（3.75十6.25）十0.1X0.375
二1.65X10十0.037
=16.5+0.037
二16.537