解方程.
1-5X=0.4 | X-0.05X=5.7 | ÷X= | 67-X+20=26. |
口算: 2.5×0.7×0.8= | (2.5+0.9)×0.4= | 42÷0.6= | 5.6×1.01= |
3.9+1.01= | 0.42= | 4.8t-0.2t-2t= | (5.5-5.5)÷3.3= |
1.52= | 3.3-0.7-0.3= |
1-5X=0.4 | X-0.05X=5.7 | ÷X= | 67-X+20=26. |
口算: 2.5×0.7×0.8= | (2.5+0.9)×0.4= | 42÷0.6= | 5.6×1.01= |
3.9+1.01= | 0.42= | 4.8t-0.2t-2t= | (5.5-5.5)÷3.3= |
1.52= | 3.3-0.7-0.3= |