72-3×8÷6 3600÷(20-5) (450+27) ÷(21-18)
300×60 =
21×70 =
24×200 =
140×70 =
11×500 =
400×32 =
29×201 ≈
68×298 ≈
0.4+6.6=
125×8=
31.4÷10=
0.2×100=
200÷25÷4=
0÷180=
25×16=
5.2+2.8-2.8+5.2=
21.3×1.6= 2.13×0.16=