×7<34 50>8× ×7 <57 6×<43
63+9=
10+58=
49-17=
83-67=
23-15=
78-19=
29+7=
80-23=
345﹣298= 0.64÷0.8= ﹣ = × =
1÷0.05= 0.25×40= 2÷ = ×25%=