15.6/9分之4+5分之22*2.25

问题描述:

15.6/9分之4+5分之22*2.25

15.6/9分之4+5分之22*2.25
=15.6×(4分之9) +5分之11×4.5
=3.9×9+11×0.9
=3.9×9+1.1×9
=(3.9+1.1)×9
=5×9
=45