24.51-2.83-7.17 72÷[960÷(145-65)] 6-÷+ 4.5×+5.5×80%
- = 40%×8= 99×1%= ÷40%= ÷ ×0=
1-2%= 0.375× = ×4÷ ×4= 4.8÷0.12= ( + )×36=
× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =