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Karate Chop!

Karate Chop!. You can do it!. What does 3 x 4 mean?. 3 groups of 4. How can I make 3 groups of 4 with these counters?. Could I rewrite 3 x 4 another way?. What if I said (3 x 2) + (3 x 2). Would that work?. (3 x 2) + (3 x 2).

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Karate Chop!

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  1. Karate Chop! You can do it!

  2. What does 3 x 4 mean? 3 groups of 4 How can I make 3 groups of 4 with these counters?

  3. Could I rewrite 3 x 4 another way? What if I said (3 x 2) + (3 x 2). Would that work?

  4. (3 x 2) + (3 x 2)

  5. Could this work with a problem like 7 x 28? What if I said (7 x 20) + (7 x 8). Would that work?

  6. 7 x 28 (7 x 20) + (7 x 8) = _________ 140 56 196

  7. 7 x 28 What does this mean? (7 x 20) 20 + 20 = 40 8 + 8 = 16 20 + 20 = 40 8 + 8 = 16 20 + 20 = 40 8 + 8 = 16 + 20 140 + 8 56 Add it together (7 x 8) 140 +56 196

  8. Could this work with a problem like 3 x 17? What if I said (3 x 10) + (3 x 7). Would that work?

  9. 3 x 17 (3 x 10) + (3 x 7) = _________ 30 21 51

  10. Now you try one! 5 x 35 OR 5 x 135 175 675

  11. Now try one more. 7 x 42 OR 7 x 342 294 2,394

  12. Let’s try more with Zero! These will be a bit harder than the other ones we did this week!(on the ppt with zeros…)

  13. Compatible Numbers SKIPPPPP!!!!

  14. Let’s go back to 7 x 28. What if I said (7 x 30) – (7 x 2) Would that work?

  15. 7 x 28 (7 x 30) - (7 x 2) = _________ 210 14 196

  16. Could this work with a problem like 3 x 49? What if I said (3 x 50) - (3 x 1). Would that work?

  17. 3 x 49 (3 x 50) - (3 x 1) = _________ 150 3 147

  18. Now you try one! Use either way you like. 5 x 38 OR 5 x 118 190 590

  19. Try another one! Use either way you like. 9 x 76 OR 9 x 476 684 4,284

  20. Now try on your own. Open your book to p.98. Do problems 7 – 19 (odd) and 23-25.

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