Question

0.25×3.6的简便计算怎么算？

0.25*3.6*4/7

Answer 1

0.25×3.6=0.25×0.9×4
=1×0.9=0.9

Answer 2

=0.25×4×0.9
=1×0.9
=0.9
乘法结合律

Answer 3

0.25×3.6=0.25×0.4×9=1×9=9

Answer 4

0.25×3.6×4/7
=1/4×36/10×4/7
=1/4×4/7×36/10
=1/7×36/10
=18/35

Answer 5

0.25×3.6
=（0.25×4）×0.9
=1×0.9
=0.9