Question

零点5×3点7×20用简便方法计算

零点5×3点7×20用简便方法计算

Answer 1

0.52×3.7+63×0.052=0.52×3.7+6.3×0.52=0.52×（3.7+6.3）=0.52×10=5.2

Answer 2

原式
=0.5x3.7x20
=(0.5x20)x3.7
=10x3.7
=37

供参考。