脱式计算(带*号的要简算)
| 19.8×0.54÷0.081 | *0.25×32×1.25 | 1.89÷0.54-7.1÷2.5 |
| *0.25×26×40 | *8.7×99 | *3.14×7.9+31.4×0.21. |
在横线里填上“>”、“<”、“=”.
| 999g________1kg | 500kg________1吨 | 15吨-10吨________5kg |
| 200+200+200________3×200 | 800×0________0+800 | 450×4________405×4. |
| 19.8×0.54÷0.081 | *0.25×32×1.25 | 1.89÷0.54-7.1÷2.5 |
| *0.25×26×40 | *8.7×99 | *3.14×7.9+31.4×0.21. |
在横线里填上“>”、“<”、“=”.
| 999g________1kg | 500kg________1吨 | 15吨-10吨________5kg |
| 200+200+200________3×200 | 800×0________0+800 | 450×4________405×4. |