16.8*9/32+7.6*9/16

问题描述:

16.8*9/32+7.6*9/16

16.8*9/32+7.6*9/16
=(16.8/2)*(9/32*2)+7.6*9/16
=8.4*9/16+7.6*9/16
=(8.4+7.6)*9/16
=16*9/16
=9