Page 1 - Lesson Notes

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

Subtraction of integers withnumber line:

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

 When we subtract a negative integer we get a greater integer which means
that adding the additive inverse of –2 to 6 is the same as subtracting (–2) from
6. We write 6 – (–2) = 6 + 2