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Today we will be learning:
• how to use a known fact to work out an unknown fact
• how to use doubling and halving.
Mental Activity
We are going to play Multiplication Bingo.
Work with a partner.
Draw a grid on paper.
Write down six even numbers from 2 to 30.
Multiply each of the next card numbers that appear by 2.
If you have the answer on your grid, crossit out.
The first pair to cross off all sixnumbers wins.
4
12
3 13 8
7 2 14
5
11
6 9
1 15
10
Main Activity
Today we are going to be working with multiplication.
2 4
12 14
86
16
10
18 20
What are the first ten multiples of 2?
22 24
32 34
2826
36
30
38 40
What are the next ten multiples of 2?
What type of numbers are the multiples of 2?
Even numbers
Let’s look at the multiples of 2 again.
When each number appears, we will say the units digit aloud.
Join in when you can hear the pattern.
22 24
32 34
2826
36
30
38 40
2 4
12 14
86
16
10
18 20
What would the next ten units digits be?
2, 4, 6, 8, 0, 2, 4, 6, 8, 0
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 75 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
Where will the multiples of 2 be on the hundred square?
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 75 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
What will the pattern look like?
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 75 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
How do you think the pattern will continue?
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 75 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
How could you use this information to work out the multiples of 4?
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 75 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
Let’s count on in fours. What do you notice?
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 75 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
The multiples of 4 are all even numbers.
Top Tip
The multiples of 4 are alternate even numbers.
We can practise saying them.
Say the blue numbers loudly and whisper the orange numbers.
2 4 12 1486 1610 18 20
22 24 32 342826 3630 38 40
Group Work
Work with a partner to find out which numbers are multiples of 4.
Practise doubling numbers.
Double numbers from 0 to 30, then double them again. Record each operation as a number sentence.
