| ①400-(1300÷65+35) | ②29+29×29 | ③15×(41-17)÷30 | ④19×96+962÷74 |
| ⑤25×44 | ⑥355+260+140+245 | ⑦50×25×20×40 | ⑧645-180-245. |
直接写出得数
| 5.6+6.5= | 9-1.9= | 6÷0.25= | 0.7×0.3= |
| 9.6÷3.2×0.8= | 4.78-1.7×0.4= | 4998÷202≈(估算) | 6b÷3+0.5b= |
| ①400-(1300÷65+35) | ②29+29×29 | ③15×(41-17)÷30 | ④19×96+962÷74 |
| ⑤25×44 | ⑥355+260+140+245 | ⑦50×25×20×40 | ⑧645-180-245. |
| 5.6+6.5= | 9-1.9= | 6÷0.25= | 0.7×0.3= |
| 9.6÷3.2×0.8= | 4.78-1.7×0.4= | 4998÷202≈(估算) | 6b÷3+0.5b= |