口算:
5.6×8= | 0.97-0.7= | 7.2+2.6= | 0.38÷2= | 8.1÷9= |
0.18÷0.6= | 3.9×0.3= | 0.45÷3= | 0.25×4÷0.25×4= | 0.1+0.9÷0.1= |
解方程.
X÷5=4 | 68+X=70 | 2X=46 | X÷3=50 | 5X=15 | X-54=20. |
5.6×8= | 0.97-0.7= | 7.2+2.6= | 0.38÷2= | 8.1÷9= |
0.18÷0.6= | 3.9×0.3= | 0.45÷3= | 0.25×4÷0.25×4= | 0.1+0.9÷0.1= |
X÷5=4 | 68+X=70 | 2X=46 | X÷3=50 | 5X=15 | X-54=20. |