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Longer Multiplication! (2 digit x 2 digit)

Longer Multiplication! (2 digit x 2 digit). Thank you Maclaine, for asking, “What do you mean by long er multiplication, Mrs. Cole?”. Here’s an example: How do we solve a problem like this? 36 27. Steps 1 - 4, Same As Before!. 4 3 6 2 7 2. 7 x 6 = 42. Steps 1 - 4, Same As Before!.

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Longer Multiplication! (2 digit x 2 digit)

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  1. Longer Multiplication!(2 digit x 2 digit)

  2. Thank you Maclaine, for asking, “What do you mean by longer multiplication, Mrs. Cole?” Here’s an example: How do we solve a problem like this?36 27

  3. Steps 1 - 4, Same As Before! 4 36 27 2 7 x 6 =42

  4. Steps 1 - 4, Same As Before! 4 36 27 252 7 x 3 =21 (21 + 4 = 25)

  5. Uh-oh! What next? 4 36 27 252 0 X Cross out what you carried, so you don’t get mixed up! Put a0 underneath the ONES column!

  6. Reed… • What number should you put under the ones column? • That’s right…a ZERO! (0)

  7. Step 5: Multiply the TENS and ONES column 2 x 6 = 12 1 4 36 27 252 20 X

  8. Step 6: Multiply the TENS and TENS columns 2 x 3 = 6 (6 + 1 = 7) 1 4 36 27 252 720 X

  9. Step 7: Add Your Answers 1 4 36 27 252 +720 972 X Final Answer: 36 x 27 = 972

  10. Step 8: Check Your Answer • Is it reasonable? • Estimate (round both numbers) • 36 x 27 = 924 40 x 30 = 1200 • Redo the problem

  11. Your turn… 83 x 57 =

  12. The answer is… 4,731

  13. Try this… 43 x 25 =

  14. The answer is… 1,075

  15. Last one… 96 x 17 =

  16. The answer is… 1,632

  17. CONGRATULATIONS!! You’re a multiplication… SUPER STAR!!

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