Question

四点七乘零点三加零点四七乘四点二加零点047乘28简便计算

Answer 1

4.7×0.3+0.47×4.2+0.047×28
=0.47×3+0.47×4.2+0.47×2.8
=0.47×（3+4.2+2.8）
=0.47×10
=4.7