Subtracting by Decomposing

Subtracting by Decomposing Numbers

Subtracting by Decomposing Numbers Step by Step

Decomposing involves breaking down a number into smaller parts to make subtraction easier.

Example 1: Subtracting 15 from 47

  1. Decompose the Second Number: Break down 15 into 10 and 5.
  2. Subtract in Parts: First, subtract 10 from 47, which is 37. Then subtract the remaining 5 from 37, giving 32.
  3. Combine the Results: The final answer is 32.

Example 2: Subtracting 28 from 63

  1. Decompose the Second Number: Break down 28 into 20 and 8.
  2. Subtract in Parts: First, subtract 20 from 63, which is 43. Then subtract the remaining 8 from 43, giving 35.
  3. Combine the Results: The final answer is 35.

Example 3: Subtracting 23 from 54

  1. Decompose the Second Number: Break down 23 into 20 and 3.
  2. Subtract in Parts: First, subtract 20 from 54, which is 34. Then subtract the remaining 3 from 34, giving 31.
  3. Combine the Results: The final answer is 31.

Remember, breaking the number you are subtracting into tens and ones can simplify the process and make mental calculations easier.

Example 4: Subtracting 12 from 39

  1. Decompose the Second Number: Break down 12 into 10 and 2.
  2. Subtract in Parts: First, subtract 10 from 39, which is 29. Then subtract 2 from 29, giving 27.
  3. Combine the Results: The final answer is 27.

Example 5: Subtracting 17 from 46

  1. Decompose the Second Number: Break down 17 into 10 and 7.
  2. Subtract in Parts: First, subtract 10 from 46, which is 36. Then subtract 7 from 36, giving 29.
  3. Combine the Results: The final answer is 29.

Example 6: Subtracting 25 from 58

  1. Decompose the Second Number: Break down 25 into 20 and 5.
  2. Subtract in Parts: First, subtract 20 from 58, which is 38. Then subtract 5 from 38, giving 33.
  3. Combine the Results: The final answer is 33.

Example 7: Subtracting 14 from 51

  1. Decompose the Second Number: Break down 14 into 10 and 4.
  2. Subtract in Parts: First, subtract 10 from 51, which is 41. Then subtract 4 from 41, giving 37.
  3. Combine the Results: The final answer is 37.

Example 8: Subtracting 19 from 62

  1. Decompose the Second Number: Break down 19 into 10 and 9.
  2. Subtract in Parts: First, subtract 10 from 62, which is 52. Then subtract 9 from 52, giving 43.
  3. Combine the Results: The final answer is 43.
John Nguyen
John Nguyen
Articles: 103

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