Division is the process of finding out how many times one number, the divisor, will fit into another number, the dividend. The division sentence results in a quotient. The signs of division are ÷ which mean divided by. You can think of division as a series of repeated subtractions, for example, 40 ÷ 10 could also solved by subtracting 10 from 40 four times:
40 − 10 − 10 − 10 − 10 = 0
Because 10 can be subtracted four times, you can say that 40 can be divided by 10 four times, or 40 ÷ 10 = 4.
Many numbers do not fit evenly into other numbers. They are not evenly divisible by those numbers, and the number left over is called the remainder.