0.84*5+0.5*0.6简算

问题描述:

0.84*5+0.5*0.6简算

0.84*5+0.5*0.6
=0.84*5+5*0.06
=(0.84+0.06)*5
=0.9*5
=4.5

0.84×5+0.5×0.6
=8.4×0.5+0.5×0.6
=0.5×(8.4+0.6)
=0.5×9
=4.5