1. 1.4 Subtraction of Real Numbers
11/13/2019
Real Numbers
Subtraction
1.4 S
KM & PP
Kathy Monaghan & Pat Peterson - AIM

2. Subtraction a - b Add Opposite Subtract
First, change SUBTRACTION to adding the opposite of the number being subtracted. Then follow the rules for ADDITION.
Add
Opposite
Subtract
1.4 S
KM & PP

3. Subtraction: Real Numbers
positive subtract positive
replace subtract with add the opposite
1.4 S
KM & PP

4. Subtraction: Real Numbers
negative subtract positive
replace subtract with add the opposite
1.4 S
KM & PP

5. Subtraction: Real Numbers
negative subtract negative
replace subtract with add the opposite
1.4 S
KM & PP

6. Subtraction: Real Numbers
positive subtract negative
replace subtract with add the opposite
1.4 S
KM & PP

7. Subtraction: Real Numbers
zero subtract negative
replace subtract with add the opposite
1.4 S
KM & PP

8. Subtraction: Real Numbers
zero subtract positive
replace subtract with add the opposite
1.4 S
KM & PP

9. Subtraction: Real Numbers
replace subtract with add the opposite
Find the
LCD
Higher
Terms
1.4 S
KM & PP

10. Subtraction: Real Numbers
replace subtract with add the opposite
Find the
LCD
Higher
Terms
1.4 S
KM & PP

11. Subtraction: Real Numbers
replace subtract with add the opposite
Find the
LCD
Higher
Terms
1.4 S
KM & PP

12. Subtraction: Real Numbers
replace subtract with add the opposite
Find the
LCD
Higher
Terms
1.4 S
KM & PP

13. Application: High vs Low
For Sacramento, California, the highest recorded temperature was 46C. The lowest recorded temperature was -8 C. Find the difference between the highest and the lowest temperatures.
The difference is 54C.
1.4 S
KM & PP

14. That’s All for Now!
1.4 S
KM & PP