用简便方法计算.
①1.25×0.25×32 | ②0.25×3.78×4 | ③6.74×10.1 | ④0.85×99 | ⑤6.8×3.7+6.8×6.3. |
直接写出得数.
12×6= | 27×2= | 640÷8= | 100×2= | 27÷9= | 7×60= |
84÷4= | 105×3= | 120×3= | 180÷6= | 500×6= | 720÷9= |
①1.25×0.25×32 | ②0.25×3.78×4 | ③6.74×10.1 | ④0.85×99 | ⑤6.8×3.7+6.8×6.3. |
12×6= | 27×2= | 640÷8= | 100×2= | 27÷9= | 7×60= |
84÷4= | 105×3= | 120×3= | 180÷6= | 500×6= | 720÷9= |