脱式计算.
6.25-40÷16×2.5 | +(4-3)÷ | [-()]÷4 | [0.8×()]÷30% |
直接写得数.
12×80= | 500÷50= | 320÷2= | 5×32= |
92-27= | 630÷3= | 22×10= | 25×4= |
25万+15万= | 760万-260万= | 0×28= | 0÷25= |
725÷80≈ | 627×19≈ | 839÷6≈ | 1871×11≈ |
6.25-40÷16×2.5 | +(4-3)÷ | [-()]÷4 | [0.8×()]÷30% |
12×80= | 500÷50= | 320÷2= | 5×32= |
92-27= | 630÷3= | 22×10= | 25×4= |
25万+15万= | 760万-260万= | 0×28= | 0÷25= |
725÷80≈ | 627×19≈ | 839÷6≈ | 1871×11≈ |