算式解决的问题是
0.5×1.4= 12÷= 0.72÷0.8 = 7.5+9.95 =
50×20%= -25%=
10﹣6.8= ﹣ = 35×1%= 1.25×24= 5× ÷5× =
0.42= 10÷0.02= 5a×7a= 1÷3= 1﹣1÷6=