Regrouping of Numbers

Regrouping of Numbers from Ones to Tens:

Writing a number in different ways is called regrouping.

Let us consider the number 18. We can think of it in these two ways:

18 ones can be regrouped as 1 ten 8 ones.

Now, consider the number 24.

Again, 2 tens 15 ones is the same as 3 tens 5 ones.

More Examples:

18 ones = 1 ten + 8 ones

14 ones = 1 ten + 4 ones

3 tens + 12 ones = 4 tens + 2 ones

5 tens + 19 ones = 6 tens + 9 ones

1 ten +18 ones = 2 tens + 8 ones

Regrouping of Numbers from Tens to Ones:

Let us consider the number 16. We can think of it in two ways.

1 ten 6 ones can be regrouped as 16 ones.

Now, consider the number 23.

2 tens 3 ones can be regrouped as 1 ten 13 ones.

Again, 3 tens 2 ones is the same as 2 tens 12 ones.

Worksheet on Regrouping of Numbers From Ones to Tens and Tens to Ones:

1. Regroup the following: One has been done for you.

(i) 7 tens 16 ones = 8 tens   6 ones

(ii) 8 tens 12 ones = ___ tens   ___ones

(iii) 5 tens 15 ones = ___ tens   ___ones

(iv) 4 tens 18 ones = ___ tens   ___ones

Answer:

1. (ii) 9 tens   2 ones

(iii) 6 tens   5 ones

(iv) 5 tens   8 ones

2. Regroup as tens and ones:

(i) 18 ones = ____________________

(ii) 24 ones = ____________________

(iii) 55 ones = ____________________

(iv) 41 ones = ____________________

(v) 39 ones = ____________________

(vi) 66 ones = ____________________

Answer:

2. (i) 1 ten 8 ones

(ii) 2 tens 4 ones

(iii) 5 tens 5 ones

(iv) 4 tens 1 one

(v) 3 tens 9 ones

(vi) 6 tens 6 ones

2nd Grade Math Practice

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