54÷9=
35-8=
8×4=
1700-800=
80+640=
42÷6=
25+9=
3×7=
3400+500=
2000-1700=
36÷6×7
72÷(4×2)
75-(38+4)
9×7-5
62+28-53
42÷(90-83)