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Repeated addition by 8’s means the multiplication table of 8.
(i) When 5 packs each having 8 crayons.
By repeated addition we can show 8 + 8 + 8 + 8 + 8 = 40
Then, eight 5 times or 5 eights
5 × 8 = 40
Therefore, there are 40 crayons.
(ii) When 7 candle-stands having 8 candles each.
By repeated addition we can show 8 + 8 + 8 + 8 + 8 + 8 + 8 = 56
Then, eight 7 times or 7 eights
7 × 8 = 56
Therefore, there are 56 candles.
We will learn how to use the number line for counting the multiplication table of 8.
(i) Start at 0. Hop 8, three times. Stop at 24.
3 eights are 24 3 × 8 = 24
(ii) Start at 0. Hop 8, six times.
Stop at ____. Thus, it will be 48
6 eights are 49 6 × 8 = 48
(iii) Start at 0. Hop 8, ten times.
Stop at ____. Thus, it will be 80
10 eights are 80 10 × 8 = 80
How to read and write the table of 8?
The above chart will help us to read and write the 8 times table.
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Read 1 eight is 8 2 eights are 16 3 eights are 24
4 eights are 32 5 eights are 40 6 eights are 48 7 eights are 56 8 eights are 64 9 eights are 72 10 eights are 80 11 eights are 88 12 eights are 96 |
Write 1 × 8 = 8 2 × 8 = 16 3 × 8 = 24
4 × 8 = 32 5 × 8 = 40 6 × 8 = 48 7 × 8 = 56 8 × 8 = 64 9 × 8 = 72 10 × 8 = 80 11 × 8 = 88 12 × 8 = 96 |
Now we will learn how to do forward counting and backward counting by 8’s.
Forward counting by 8’s: 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, ……
Backward counting by 8’s: ……, 200, 192, 184, 176, 168, 160, 152, 144, 136, 128, 120, 112, 104, 96, 88, 80, 72, 64, 56, 48, 40, 32, 24, 16, 8, 0
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