如图，三角形的面积是12平方厘米，平行四边形的面积是________平方厘米，平行四边形面积和梯形面积的最简整数比是________．| 1.4×0.5= | 7.5÷1.5= | 0.48÷1.6= | 0.51÷17= |
| 1.2×0.4= | 1.8-0.93= | 0.67+0.43= | 2.5×5-2.5= |
| 5.4÷0.01= | 0.6÷0.12= | 3.2×2.5= | 0.4×4÷0.4×4= |
脱式计算、（能简算的简算）
| 201×0.65-0.65 | 3.6×0.7×2.5 |
| 6.44×3.7+6.44×6.3 | 1.25×39.5×0.8． |
| 1.4×0.5= | 7.5÷1.5= | 0.48÷1.6= | 0.51÷17= |
| 1.2×0.4= | 1.8-0.93= | 0.67+0.43= | 2.5×5-2.5= |
| 5.4÷0.01= | 0.6÷0.12= | 3.2×2.5= | 0.4×4÷0.4×4= |
| 201×0.65-0.65 | 3.6×0.7×2.5 |
| 6.44×3.7+6.44×6.3 | 1.25×39.5×0.8． |