Question

4.8xo.25的简便计算

Answer 1

方法庆宽睁一誉岁巧旁：4.8x0.25
=（4+0.8）×0.25
=4×0.25+0.8×0.25
=1+0.2
=1.2
方法二：4.8x0.25
=1.2×4×0.25
=1.2×1
=1.2