
Concept explainers
Subtract. Check each answer by adding.
a.
b.
c.
d.

a. To find:
The value of 12 – 9.
Answer to Problem 1CM
Solution:
3
Explanation of Solution
Approach:
1) Subtract the numbers.
2) Test the result by adding.
Calculation:
Test:
Add 9 and 3
Final statement:

b. To find:
The value of
Answer to Problem 1CM
Solution:
15
Explanation of Solution
Approach:
1) Subtract the numbers.
2) Test the result by adding.
Calculation:
Test:
Add 7 and 15
Final statement:

c. To find:
The value of
Answer to Problem 1CM
Solution:
0
Explanation of Solution
Approach:
1) Subtract the numbers.
2) Test the result by adding.
Calculation:
Test:
Add 35 and 0
Final statement:

d. To find:
The value of
Answer to Problem 1CM
Solution:
70
Explanation of Solution
Approach:
1) Subtract the numbers.
2) Test the result by adding.
Calculation:
Test:
Add 0 and 70
Final statement:
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