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Instead of subtracting a negative number, we can add.
Start by rewriting the subtraction as addition.
Use the Commutative and Associative Properties of Addition.
- 1
9
- 24
Next, we move 4 units to the right of - 5 on the number line to represent adding 4 to the difference.
The final position after moving to the left and then to the right on the number line is the result of our expression. 8-13-(- 4)= - 1
a-(- b)=a+b
Add terms
a+(- b)=a-b
Subtract term
Next, we move 2 units to the left of 11 on the number line.
The final position after moving along the number line is the result of our expression. 4-(- 7)+(- 2)= 9
Commutative Property of Addition
Associative Property of Addition
Subtract term
Add terms
Now we move 3 units to the right of - 27 on the number line to show adding 3 to the difference.
The final position after moving along the number line is the result of our expression. - 7+3-20= - 24
