Multiplication Table of 21

Repeated addition by 21’s means the multiplication table of 21.

(i) When 6 rows of twenty-one soldiers each.

By repeated addition we can show 21 + 21 + 21 + 21 + 21 + 21 = 126

Then, twenty-one 6 times or 6 twenty-one’s

6 × 21 = 126

Therefore, there are 126 soldiers.

(ii) When 9 bunches each having 21 flowers.

By repeated addition we can show 21 + 21 + 21 + 21 + 21 + 21 + 21 + 21 + 21 = 189

Then, twenty-one 9 times or 9 twenty-one’s

9 × 21 = 189

Therefore, there are 189 flowers.

We will learn how to use the number line for counting the multiplication table of 21.

$21 Times Table on Number Line$

(i) Start at 0. Hop 21, four times. Stop at 84.

4 twenty-one’s are 84 4 × 21 = 84

(ii) Start at 0. Hop 21, seven times.

Stop at ____. Thus, it will be 147

7 twenty-one’s are 147 7 × 21 = 147

(iii) Start at 0. Hop 21, eleven times.

Stop at ____. Thus, it will be 231

11 twenty-one’s are 231 11 × 21 = 231

How to read and write the table of 21?

$Multiplication Table of Twenty-One$

The above chart will help us to read and write the 21 times table.

Read

1 twenty-one is 21

2 twenty-one’s are 42

3 twenty-one’s are 63

4 twenty-one’s are 84

5 twenty-one’s are 105

6 twenty-one’s are 126

7 twenty-one’s are 147

8 twenty-one’s are 168

9 twenty-one’s are 189

10 twenty-one’s are 210

11 twenty-one’s are 231

12 twenty-one’s are 252

Write

1 × 21 = 21

2 × 21 = 42

3 × 21 = 63

4 × 21 = 84

5 × 21 = 105

6 × 21 = 126

7 × 21 = 147

8 × 21 = 168

9 × 21 = 189

10 × 21 = 210

11 × 21 = 231

12 × 21 = 252

Now we will learn how to do forward counting and backward counting by 21’s.

Forward counting by 21’s: 0, 21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, 336, 357, 378, 399, 420, 441, 462, 483, 504, 525, ……

Backward counting by 21’s: ……, 525, 504, 483, 462, 441, 420, 399, 378, 357, 336, 315, 294, 273, 252, 231, 210, 189, 168, 147, 126, 105, 84, 63, 42, 21, 0