Repeated addition by 3’s means the multiplication table of 3.
(i) When 4 groups having three starfish each.
By repeated addition we can show 3 + 3 + 3 + 3 = 12
Then, three 4 times or 4 threes
4 × 3 = 12
Therefore, there are 12 starfish.
(ii) When there are 8 boxes which contain three pencils in each box.
By repeated addition we can show 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 24
Then, three 8 times or 8 threes
8 × 3 = 24
Therefore, there are 24 pencils.
We will learn how to use the number line for counting the multiplication table of 3.
(i) Start at 0. Hop 3, two times. Stop at 6.
2 threes are 6 2 × 3 = 6
(ii) Start at 0. Hop 3, six times.
Stop at ____. Thus, it will be 18
6 threes are 18 6 × 3 = 18
(iii) Start at 0. Hop 3, eleven times.
Stop at ____. Thus, it will be 33
11 threes are 33 11 × 3 = 33
How to read and write the table of 3?
The above diagram will help us to read and write the 3 times table.
Read
1 three is 3 2 threes are 6 3 threes are 9 4 threes are 12 5 threes are 15 6 threes are 18 7 threes are 21 8 threes are 24 9 threes are 27 10 threes are 30 11 threes are 33 12 threes are 36 |
Write
1 × 3 = 3 2 × 3 = 6 3 × 3 = 9 4 × 3 = 12 5 × 3 = 15 6 × 3 = 18 7 × 3 = 21 8 × 3 = 24 9 × 3 = 27 10 × 3 = 30 11 × 3 = 33 12 × 3 = 36 |
Now we will learn how to do forward counting and backward counting by 3’s.
Forward counting by 3’s: 0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, ……
Backward counting by 3’s: ……, 75, 72, 69, 66, 63, 60, 57, 54, 51, 48, 45, 42, 39, 36, 33, 30, 27, 24, 21, 18, 15, 12, 9, 6, 3, 0.
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