CLASS-7
SUBTRACTION OF INTEGERS ON NUMBER LINE

Subtraction of Integer 

RULES –

1) To subtract a positive integers +x, move x unit to the left of the given integers.

2) To subtract a negative integers –x, move x unit to the right of the given integers.   

 

Example.1) 

To subtract positive integers, move to the left of the given integer by as many unit distances as the absolute value of the integer to be subtracted. Now, we have to move from +7 to 2 units to the left to reach at +5.

(+7) – (+5) = 2



 

Example.2)

To subtract a negative integers, move to the right of the given integers by as many unit distance as the absolute value of the integer to be subtracted. Now, we have to move from (-8) to the right and arrive at (-2).

So, we can conclude that,  (-8) – (-6) = -8 + 6 = -2