300×60 =
21×70 =
24×200 =
140×70 =
11×500 =
400×32 =
29×201 ≈
68×298 ≈
132+68=
125×8=
567-77=
28×10=
88+12=
37+23=
25×4=
210÷70=
5×18+650÷13 [170- (45-15)]×23
7.05-0.05=
2.13+14=
4.9-0.8=
0.35+0.45=
10-0.04=
5.4+3.6=
4.6-3.9=
4.27+1.13=
8×105= 224×20= 603×21≈ 13m-4m=
200×12= 250×80= 399×42≈ 8×x×y=
4.8+2=
13.4-8=
2.4+0.61=
0.84-0.48=
5.3+7.7=
3.2-2=
1-0.03=
2.38+0.7=
0.35+1.65=
6.8-1.2=