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Learn about expressions and number sentences in algebra. Also, practice solving a few questions on the topic as well.

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LESSON 4.6

Algebra: Expressions and Number Sentences

Number sentences contain Examples:

numbers, operations, and 4 !5 " 9 9#4"5

an equal sign.

Some number sentences Examples:

are true. 3 ! 5 " 8 True 9 # 7 " 2 True

Some number sentences Examples:

are false. 3 ! 2 " 9 False 7 # 5 " 6 False

An expression is part of Examples

a number sentence. It 3!2 3!5 9#7

contains numbers and 7#5 9#4 4!5

operations. It does not

contain an equal sign.

Write an expression for each. Then write a number sentence and solve.

1. Ron has 13 yellow apples 2. Marsha bought 24 eggs. She

and 25 red apples. How used 8 for breakfast. How

many apples does he have many eggs does she

altogether? have now?

3. Kyle has 15 more pages to 4. Jill bought 2 oranges,

read than Linda. Linda has 3 apples, and 9 bananas.

12 pages to read. How many How many more bananas

pages does Kyle have than oranges did she buy?

to read?

© Harcourt

Write ! or # to complete the number sentence.

5. 8 ! 4 " 12 6. 7 " 16 # 9 7. 12 # 3 " 9

8. 18 # 6 " 7 ! 5 9. 19 ! 3 " 22 10. 16 ! 11 " 27

11. 12 # 7 " 3 ! 2 12. 2 ! 9 " 17 # 6 13. 8 ! 8 " 16

RW24 Reteach

Algebra: Expressions and Number Sentences

Number sentences contain Examples:

numbers, operations, and 4 !5 " 9 9#4"5

an equal sign.

Some number sentences Examples:

are true. 3 ! 5 " 8 True 9 # 7 " 2 True

Some number sentences Examples:

are false. 3 ! 2 " 9 False 7 # 5 " 6 False

An expression is part of Examples

a number sentence. It 3!2 3!5 9#7

contains numbers and 7#5 9#4 4!5

operations. It does not

contain an equal sign.

Write an expression for each. Then write a number sentence and solve.

1. Ron has 13 yellow apples 2. Marsha bought 24 eggs. She

and 25 red apples. How used 8 for breakfast. How

many apples does he have many eggs does she

altogether? have now?

3. Kyle has 15 more pages to 4. Jill bought 2 oranges,

read than Linda. Linda has 3 apples, and 9 bananas.

12 pages to read. How many How many more bananas

pages does Kyle have than oranges did she buy?

to read?

© Harcourt

Write ! or # to complete the number sentence.

5. 8 ! 4 " 12 6. 7 " 16 # 9 7. 12 # 3 " 9

8. 18 # 6 " 7 ! 5 9. 19 ! 3 " 22 10. 16 ! 11 " 27

11. 12 # 7 " 3 ! 2 12. 2 ! 9 " 17 # 6 13. 8 ! 8 " 16

RW24 Reteach