Equivalent Number Expressions and Sets Using Addition and Subtraction

I. PRETEST
Directions: Match the set in column A that is equivalent to the set in column B. Write the letter of your answer in the space provided before the number.

COLUMN A COLUMN B

_____ 1. A.

_____ 2. B.

_____ 3. C.

_____ 4. D.

_____ 5. E.

THINGS YOU NEED TO KNOW

• EQUIVALENT SETS are sets that have the same number of elements.
Say for example:

is equivalent to

The two sets are equivalent because they both have two elements.

• EQUIVALENT NUMBER EXPRESSIONS are two expressions that have the er same value.
Say for example:

3 + 2 is equivalent to 4 + 1

Another example:

5 - 2 is equivalent to 1 + 2

II. ACTIVITIES

ACTIVITY 1

______ 1. 4 a. 1 + 1
______ 2. 8 b. 6 + 4
______ 3. 2 c. 3 + 6
______ 4. 1 d. 3 + 2
______ 5. 10 e. 4 + 3
______ 6. 3 f. 1 + 0
______ 7. 7 g. 5 + 1
______ 8. 6 h. 2 + 6
______ 9. 9 i. 2 + 1
______ 10. 5 j. 2 + 2

ACTIVITY 2

______ 1. 4 – 2 a. 4
______ 2. 8 - 7 b. 9
______ 3. 10 - 3 c. 7
______ 4. 12 - 4 d. 2
______ 5. 6 - 3 e. 3
______ 6. 10 - 1 f. 8
______ 7. 8 - 4 g. 1
______ 8. 10 - 0 h. 6
______ 9. 7 - 2 i. 10
______ 10. 8 - 2 j. 5

ACTIVITY 3

______ 1. 10 + 2 a. 20 - 5
______ 2. 13 - 5 b. 16 - 4
______ 3. 9 + 1 c. 17 - 1
______ 4. 11 + 4 d. 9 + 0
______ 5. 13 + 3 e. 15 - 5
______ 6. 10 - 1 f. 10 - 2
______ 7. 8 - 5 g. 17 + 0
______ 8. 10 - 4 h. 7 - 5
______ 9. 17 - 0 i. 10 - 7
______ 10. 6 - 4 j. 5 + 1

WHAT HAVE I LEARNED

_____ 1. 10 - 3 A.

_____ 2. 12 - 8 B.

_____ 3. 5 + 4 C.

_____ 4. 7 + 5 D.

_____ 5. 13 - 3 E.

CHECKING CONCEPTS
PRACTICE TEST

Directions: Choose