30÷5×6=54 8×6+ = 70 63÷7×9=36 (27+18)÷ = 15 ÷23, 5)=7 ÷(15-8)=7
30:5=6, 6*6=36 8*6+22=70 63:7*9= 81 (27+18):3 =15