300×60 =
21×70 =
24×200 =
140×70 =
11×500 =
400×32 =
29×201 ≈
68×298 ≈
280+260=
375-270=
45×4=
540÷9-6=
20×25=
640÷40=
175-5×5=
156÷6×0=