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

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Presentation transcript:

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. MULTIPLICATION saves us the time and trouble of repeated addition.

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

1. Multiply: 7 x 7 Response Grid A.35 B.42 C.49 D.56 E.81

Participant Scores 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7

2. Multiply: 3 x 12 Response Grid A.15 B.30 C.32 D.36 E.42

Fastest Responders (in seconds) 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7 0Participant 8 0Participant 9 0Participant 10

Participant Scores 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7

3. Multiply: 5 x 9 Response Grid A.45 B.50 C.55 D.56 E.72

Fastest Responders (in seconds) 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7 0Participant 8 0Participant 9 0Participant 10

Participant Scores 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7

4. Evaluate: -6 x 4 Response Grid A.-24 B.-2 C.2 D.24

5. Evaluate: (-3)x(-7) Response Grid A.-21 B.-10 C.10 D.21

6. Evaluate: 10(-2) Response Grid A.-20 B.-8 C.8 D.20

Participant Scores 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7

7. Which of the following is NOT a multiple of 4? Response Grid A.124 B.155 C.136 D.240 E.452

Fastest Responders (in seconds) 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7 0Participant 8 0Participant 9 0Participant 10

What is another way to represent ? Response Grid A.36 B.6 x 6 x 6 x 6 x 6 C.6 5 D.6 x 5 E.66,666

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 II. 25 x 4 III Response Grid A.I only B.II only C.III only D.I and II, not III E.I and III, not II

Participant Scores 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7

Which of the following represents: – 3 – 3 – 3 – 3 ? Response Grid A.. B.. C.. D

Fastest Responders (in seconds) 0Participant 1 0Participant 2 0Participant 3 0Participant 4 0Participant 5 0Participant 6 0Participant 7 0Participant 8 0Participant 9 0Participant 10