1÷ 1= 1

2÷ 1=2 2÷2= 1 4÷2=2

3÷ 1=3 3÷3= 1 6÷3=2 9÷3=3

4÷ 1=4 4÷4= 1 8÷4=2 12÷4=3 16÷4=4

5÷ 1=5 5÷5= 1 10÷5=2 15÷5=3 20÷5=4 25÷5=5

6÷ 1=6 6÷6= 1 12÷6=2 18÷6=3 24÷6=4 30÷6=5 36÷6=6

7÷ 1=7 7÷7= 1 14÷7=2 2 1÷7=3 28÷7=4 35÷7=5 42÷7=6 49÷7=7

8÷ 1=8 8÷8= 1 16÷8=2 24÷8=3 32÷8=4 40÷8=5 48÷8=6 56÷8=7 64÷8=8

9÷ 1=9 9÷9= 1 18÷9=2 27÷9=3 36÷9=4 45÷9=5 54÷9=6 63÷9=7 72÷9=8

8 1÷9=9

2, integer division law:

(1) Start with the quotient of the dividend, first look at how many digits there are in the dividend, and then try to divide the dividend by the first few digits. If it is smaller than the divisor, divide it by one digit as much as possible;

(2) Write the quotient on ex-dividend;

(3) The remainder after each division operation must be less than the divisor.