Composing and Decomposing Numbers Worksheet

Practice composing and decomposing numbers up to 1,000 with this Grade 3 math worksheet, focusing on place value and addition strategies.

Grade 3 Math AdditionAddition StrategiesComposing and Decomposing Numbers

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Includes

2 Fill in the Blanks2 Short AnswerMultiple ChoiceTrue / False

Standards

CCSS.MATH.CONTENT.3.NBT.A.2

Topics

mathgrade 3composing numbersdecomposing numbersplace valueaddition

8 sections · Free to use · Printable

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Composing and Decomposing Numbers

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Read each question carefully and follow the instructions to compose or decompose numbers.

Decompose each number into its hundreds, tens, and ones.

1. 345 = hundreds + tens + ones

2. 709 = hundreds + tens + ones

3. 120 = hundreds + tens + ones

4. 58 = hundreds + tens + ones

Compose the numbers from the given hundreds, tens, and ones.

1. 2 hundreds + 5 tens + 3 ones =

2. 8 hundreds + 0 tens + 7 ones =

3. 4 hundreds + 6 tens + 0 ones =

4. 0 hundreds + 9 tens + 1 one =

5. Look at the number line below. What number is highlighted? Decompose it into tens and ones.

6. Which of the following shows the number 672 decomposed correctly?

6 hundreds + 70 tens + 2 ones

6 hundreds + 7 tens + 2 ones

60 hundreds + 7 tens + 2 ones

6 hundreds + 7 tens + 20 ones

7. Sarah has 4 hundreds blocks, 12 tens rods, and 5 ones cubes. What number can she compose? Decompose your answer into standard hundreds, tens, and ones.

8. The number 503 can be decomposed as 5 hundreds + 3 tens + 0 ones.

True

False