6×7-30=
(23+12)÷5=
(28-14)÷7=
(42-20)÷2=
72÷9+24=
(38-12)÷2=
7×4+25 54÷(43-37) 63÷9+34
(77-69)×7 18-6÷3 (32+16)÷8
4×(8-2)=
30-2×5=
(20+10)÷6=
18-18÷3=
7×5+5=
56÷7+12=
9-72÷8=
11-15÷5=
(19-9)÷2=
。
8