In the third grade, I learned to divide the divisor by a number. There are two cases: there is a 0 in the middle of the quotient and a 0 at the end.

Pen division: the pen calculation method of dividing three digits by one digit: divide one digit from the high position, and divide the quotient of one digit to write which digit. The remainder of each division must be less than the divisor. If the quotient of the highest divisor is not 1, it will go back one place. If other digits are not quotient 1, place them with 0.

0 times any number is equal to 0. 0 divided by any number that is not 0 equals 0. 0 is not divisible, three digits are divided by one digit, and the quotient may be two digits or three digits. The quotient is three digits when the hundred digits are enough to divide, and two digits when the hundred digits are not enough to divide. Calculation of division: → Use multiplication. No residue: quotient× divisor = dividend; There is a remainder: quotient × divisor+remainder = dividend.

Introduction of division operation in grade three;

The basic law of division operation: where to write the quotient from the high-order division; ? Which bit has a remainder, it is merged with the number on the next bit, and then divided; Which is not quotient 1, plus 0 placeholder; The remainder must be less than the divisor.

Characteristics of multiples of special numbers: multiples of 2: Numbers with 2, 4, 6, 8 and 0 are multiples of 2. Multiply of 5: A number with a bit of 0 or 5 is a multiple of 5. Multiply of 3: The sum of the numbers on each digit is a multiple of 3, and this number is a multiple of 3.