列式:
①26+34+18
②87-63+28
③69-12-45
④37-(48-36)
⑤26+45-39
⑥78-(24+17)
4×8= 48÷6= 3×9= 72÷8=
2×8= 6×6= 54÷9= 7×7=
15÷3= 56÷8= 9×2= 42÷6=
4×4+4= 6×9-6= 5×4+5= 4×8-8=
12+18-9= 50+31+11= 90-20-8= 76-22+22=
68+32= 10-0.6= 1.25×80= 0.8÷0.04=
2.4÷ = × = 5×8%= ÷ =