A number that ends in one or more zeros, such as 10, 100, or 1000.
A prime number that cannot be divided by any number except 1 and itself.
A number that is a perfect square.
A number that can be evenly divided by any single digit number.
5
15
10
0
6
5
7
8
Cancel the zeros and divide the smaller numbers.
Subtract the smaller number from the larger one.
Multiply the smaller number by itself.
Add zeros to the smaller number.
15
10
30
20
200
40
50
20
Cancel zeros, then divide 20 by 4 to get 5.
Subtract 400 from 2000 repeatedly until reaching 0.
Multiply both numbers by 10 before division.
Add zeros to 400 and then divide.