口算。40÷5=                       18÷3=      &#160

口算。40÷5=                       18÷3=                     18÷2=                  81÷9=    54÷9=                       7÷7=                       42÷6=                  49÷7=   56÷8=                       35÷5=                     64÷8=                   27÷3=
0.07