What is the rule for subtracting integers?
An integer is a number with no decimal or fractional part, from the set of negative and positive numbers, including zero
Answer: a - b = a + (- b). To subtract a number from another number, the sign of the number (which is to be subtracted) should be changed and then this number with the changed sign, should be added to the first number.
Let's understand the rule in detail.
The subtraction of integers is very much much similar to addition. It can be done as follows
1. Change the sign of the number to be subtracted and add them up.
2. The result takes the sign of the greater number
- (-10) - (-12) = -10 + ( 12) = -10 + 12 = 2
- 2 - (-3) = 2 + (3) = 5
(+6) – (+2) = (+6) + (-2) = 6 - 2 = 4