× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =
1÷0.25= 15×60= 72×25%=
1.1-0.01= 12÷ =
24×( )=