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SAI International School

CLASS-VI
Mathematics
CHAPTER-6: Integers

LESSON NOTES-4

SUBTOPIC: Subtraction of Integers

Subtraction of integers without number line:

➢ The subtraction of an integer is the same as the addition of its additive inverse.
➢ To subtract an integer from another integer it is enough to add the additive
inverse of the integer that is being subtracted, to the other integer.

Ex- 6 – (– 2).

Subtracting -2 from 6 is same as adding the additive inverse of -2 to 6.
Additive inverse of -8 is 8

Therefore, 6 - (-2) = 8

Ex- (-6) – (-2) = (- 6) + 2 = - 4

Ex- (-2) – 6 = -(2 + 6) = -8

Subtraction of integers with number line:

➢ We have also seen that while using a number line for whole numbers, for
subtracting 2 from 6, we would move towards left of 6 i.e. 6 – 2 = 4

➢ When we subtract a negative integer and a position integer, we add the
additive inverse of –2 to 6 which is the same as subtracting (–2) from 6. We
write 6 – (–2) = 6 + 2 = 8