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The All Partial Algorithm

The All Partial Algorithm. A guide to help solve 2 digit multiplication problems. First, record the problem. 36 x 4. Second, break apart the number in your head or on paper. 36 (30 + 6) x 4. Third, imagine multiplying this equation. 36 (30 + 6) x 4 x 4.

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The All Partial Algorithm

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  1. The All Partial Algorithm A guide to help solve 2 digit multiplication problems

  2. First, record the problem 36 x 4

  3. Second, break apart the number in your head or on paper 36 (30 + 6) x 4

  4. Third, imagine multiplying this equation 36 (30 + 6) x 4x 4

  5. Fourth, multiply the ones column first. 36 (30 + 6) x 4x 4 24 24

  6. Fifth, multiply the tens column 36 (30 + 6) x 4x 4 2424 120 120

  7. Sixth, add the numbers together 36 (30 + 6) x 4x 4 2424 + 120+ 120 144 144 4x6=24 4x30=120

  8. …multiply the ones column, then the tens column, then add 36 x 4 24 4x6=24 + 1204x30=120 144

  9. Here is what multiplying by a 3-digit number looks like: 253 (200+50+3) x 3x 3 9 3x3=9 150 3x50=150 + 600 3x200=600 759 Think...

  10. Try this problem, then click to check your answer. 73 x 5

  11. With practice, you will become very proficient with the… 73 x 5 15 + 350 365 All Partial Algorithm

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