89

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Multiplication and division:
2s, 3s, 4s and 5s up to 75

Term 3

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How fast can you answer the following?

1 × 2 = 5 × 3 = 4 × 2 = 10 × 2 =
4 × 3 = 3 × 2 = 2 × 2 = 3 × 3 =
6 × 4 = 4 × 3 = 5 × 3 = 9 × 4 =
6 × 5 =  8 × 3 = 9 × 4 = 8 × 5 =
7 × 3 = 8 × 5 = 2 × 5 = 7 × 5 =

 

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Colour the blocks where the sum gives you a remainder.

12 ÷ 2 = 6 13 ÷ 3 = 4 rem 1 15 ÷ 5 = 18 ÷ 5 =
20 ÷ 4 = 23 ÷ 4 = 16 ÷ 3 = 18 ÷ 3 =
25 ÷ 2 = 24 ÷ 2 = 30 ÷ 2 = 29 ÷ 2 =
19 ÷ 3 = 17 ÷ 3 = 31 ÷ 5 = 30 ÷ 5 =
55 ÷ 5 = 52 ÷ 5 = 57 ÷ 3 = 60 ÷ 3 =

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How do you know that a number can be divided by:

  • 3? If you add the digits of a number (e.g. 72 has the digits 7 + 2 = 9) and you can divide that new number by 3 (e.g. 9 is divisible by 3).
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    2?
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    5?

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Divide and test your answer.

65 ÷ 3 21 × 3 + 2
a. 49 ÷ 5

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b. 65 ÷ 5

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Solve the following:

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You need to go and do some research.

How do you know if a number is divisible by 4?