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Fourth/Subtraction

Subtract Multiples of Ten within 1,000

Practice subtracting whole tens from whole tens within 0-1,000 to build fluency.
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Practice Questions

  1. 850 - 40 = ?
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    810

  2. 720 - 30 = ?
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    690

  3. 640 - 20 = ?
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    620

  4. 560 - 10 = ?
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    550

  5. 480 - 50 = ?
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    430

Quick Tip
Subtracting whole tens helps improve mental math skills.
Teacher Resources
Teaching Notes

Emphasize place value: subtracting tens means subtracting from the tens place, keeping the ones place zero. Use a hundreds chart or number line for visual support. Encourage mental math strategies.

Vocabulary
Multiple of Ten: Numbers like 10, 20, 30, etc.
Place Value: The value of a digit based on its position.
Common Mistakes
  • Subtracting from the wrong place value (e.g., subtracting tens from hundreds).
  • Forgetting to write the zero in the ones place when subtracting whole tens.
Differentiation
SupportUse base-ten blocks or a hundreds chart to visually represent the subtraction. Start with smaller numbers (within 100).
ChallengeChallenge students to subtract two multiples of ten from a three-digit number that isn't a multiple of ten (e.g., 354 - 20). Introduce estimation.
Discussion Questions
  • How is subtracting 30 from 70 like subtracting 3 from 7?
  • What happens to the ones digit when we subtract whole tens?
  • Can you subtract 40 from 200 without counting? How?
Extension Activities
  • Use a hundreds chart.
  • Skip count by tens.
  • Relate to money (dimes).
Parent Tip

Ask your child to count backward by tens from a number.

Learning Path
Skill Cluster

Number Sense & Place Value

Estimated Time

15 minutes

Skills Practiced
Subtracting multiples of tenPlace value subtractionThree digit subtraction