★46+389 ★857﹣777 318+507+1127×41 68×5 47÷6 70÷8.
4.9:6.3= :9== ÷72≈ %
=5== ÷ .
在横线里填上合适的数:===,== 9÷ ====.
0.7÷5=7: == %.
=0.375=21÷ =6: = %.