1﹣ + = 1÷ × = 0.5﹣ +0.5﹣ =
8.1+ = ( + )×24= 7× ×7÷ =
9﹣0.9= 72÷0.4= 1.25×8=
7×8÷7×8= 0×0.35+3.5= +=
×+×= 0.52= 6×3.14=