Subtraction of Integers

What is the correct arrangement of steps in subtracting integers?

I. Change the subtraction sign into addition sign

II. Change the sign of the subtrahend and proceed to addition

III. Keep/copy the first number

• I, II, III

• III, I, II

• II,III,I

• True

• False

• True

• False

You take 3 steps forward and 7 steps backward. How many steps have you taken?

• 4 steps forward

• 4 steps backward

Answer explanation

Forward is 3

Backward is -7

3-7= 3+(-7) = -4

Therefore, you have taken 4 steps backward.

The record high temperature for Massachusetts is 109 degrees Fahrenheit. The record low is -20 degrees Fahrenheit. What is the difference between high and low?

• 89

• 129

• -89

• -129

Answer explanation

Difference between high and low is the same as subtracting the smaller number from the bigger number.

104 - -18 = 104 + 18 = 122

The difference between high and low is 122 degrees Fahrenheit.