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Multiplying by 2-digit factors

Multiplying by 2-digit factors. Partial Products. How can we multiply 23 × 15. Draw a box and divide it into four pieces. Write the value of each digit in the number 23 across the top. Then write the value of each digit in the number 15 on the side of the box. . 20. 3. 10. 5.

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Multiplying by 2-digit factors

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  1. Multiplying by 2-digit factors Partial Products

  2. How can we multiply 23 × 15 • Draw a box and divide it into four pieces. • Write the value of each digit in the number 23 across the top. Then write the value of each digit in the number 15 on the side of the box. 20 3 10 5

  3. How can we multiply 23 × 15 3. Multiply the two numbers that meet in each box. 20 3 200 30 10 100 15 5

  4. How can we multiply 23 × 15 4. Add of the 4 products that are in the boxes together. 200 100 30 + 15 20 3 200 30 10 100 15 5 345

  5. How can we multiply 23 × 15 23 × 15 = 345 200 100 30 + 15 20 3 200 30 10 100 15 5 345

  6. Multiply 47 × 24 1. Draw your box 40 7 800 160 140 + 28 800 140 20 160 28 4 2. Label the box 1128 3. Multiply 4. Add

  7. Multiply 73 × 46 1. Draw your box 70 3 2800 420 120 + 18 2800 120 40 420 18 6 2. Label the box 3358 3. Multiply 4. Add

  8. Multiply 37 × 18 300 240 70 + 56 30 7 300 70 10 240 56 8 666

  9. Try the following problems on your own in your math journal. • 63 × 54 • 95 × 37 • 46 × 83 • 27 × 62

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