Question

1.25乘6.4乘0.25用简便计算

Answer 1

1.25*6.4*0.25=5/4*32/5*4/1
把数字换成分数，可约分，更好算若是未学习分数，可拆开算
1.25*6.4*0.25+1.25*【（6+0.4）*0.25】

Answer 2

解 原式=1.25×8×0.2×4×0.25
=10×0.2×1
=2

Answer 3

=1.25×8×0.2×4×0.25
=10×0.2×1
=2