怎样简便怎样算. (1)16﹣5.32﹣4.68 (2)7.29×4.6+4.6×12.71 (3)3.4﹣0.15×2.6 (4)1.25×2.5×3.2 (5)40.4÷(0.5+7.5) (6)[(8.1﹣5.6)×0.9﹣1]×0.4.
×9+12×
42:=x:
x-x=
(2.4×1.5-1.5)÷0.7
(3.2+3.2+3.2+3.2) ×2.5