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Intro to Multiplying

Intro to Multiplying. What you “know”. Times tables to ________ Rules for multiplying integers. What we need to understand. There are patterns and tricks that can help us get better at our times tables. There are reasons that the rules for multiplying integers work out like they do.

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Intro to Multiplying

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  1. Intro to Multiplying

  2. What you “know” Times tables to ________ Rules for multiplying integers

  3. What we need to understand There are patterns and tricks that can help us get better at our times tables. There are reasons that the rules for multiplying integers work out like they do. MULTIPLICATION saves us the time and trouble of repeated addition.

  4. The first 3 slides are timed problems from our times tables The faster you answer correctly, the more points you earn.

  5. 1. Multiply: 7 x 7 • 35 • 42 • 49 • 56 • 81 Response Grid

  6. Participant Scores

  7. 2. Multiply: 3 x 12 • 15 • 30 • 32 • 36 • 42 Response Grid

  8. Fastest Responders (in seconds)

  9. Participant Scores

  10. 3. Multiply: 5 x 9 • 45 • 50 • 55 • 56 • 72 Response Grid

  11. Fastest Responders (in seconds)

  12. Participant Scores

  13. 4. Evaluate: -6 x 4 • -24 • -2 • 2 • 24 Response Grid

  14. 5. Evaluate: (-3)x(-7) • -21 • -10 • 10 • 21 Response Grid

  15. 6. Evaluate: 10(-2) • -20 • -8 • 8 • 20 Response Grid

  16. Participant Scores

  17. 7. Which of the following is NOT a multiple of 4? • 124 • 155 • 136 • 240 • 452 Response Grid

  18. Fastest Responders (in seconds)

  19. What is another way to represent8. 6 + 6 + 6 + 6 + 6 ? • 36 • 6 x 6 x 6 x 6 x 6 • 65 • 6 x 5 • 66,666 Response Grid

  20. 9. Each person who joins the club pays $25 in dues. If 4 people join, which of the following gives the total amount of dues?I. 25 + 25 + 25 + 25II. 25 x 4 III. 25 + 4 • I only • II only • III only • I and II, not III • I and III, not II Response Grid

  21. Participant Scores

  22. 10. Which of the following represents: – 3 – 3 – 3 – 3 ? • . • . • . • . -6 -3 0 -15 -12 -9 -6 -3 0 -15 -12 -9 6 9 12 -3 0 3 6 9 12 -3 0 3 Response Grid

  23. Fastest Responders (in seconds)

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