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Adding Tens with Ones by regrouping

1. 2 tens + 12 ones

= 2 tens + 10 ones + 2 ones

= 2 tens + 1 ten + 2 ones
= 3 tens 2 ones =

2. 4 tens + 26 ones
= 4 tens + 20 ones + 6 ones

= 4 tens + 2 tens + 6 ones
= 6 tens 6 ones

=

Practice Time 2C

1. regroup the following ones into tens and ones.

(a) 44 ones = __ tens + __ ones (b) 57 ones = __ tens + __ ones
(c) 70 ones = __ tens + __ ones (d) 81 ones = __ tens + __ one

2. regroup and add the given tens and ones.

(a) 5 tens + 16 ones (b) 4 tens + 25 ones
= 5 tens + __ ones + __ ones = 4 tens + __ ones + __ ones

= __ tens + __ ten + __ ones = __ tens + __ tens + __ ones
= __ tens + __ ones = __ tens + __ ones

(c) 7 tens + 27 ones = __ tens + __ ones
(d) 4 tens + 35 ones = __ tens + __ ones

(e) 1 ten + 55 ones = __ tens + __ ones

ADDITION wITh reGrOuPING TO mAke TeNS

Shikha has 23 crayons. She takes 7 crayons from her brother.

How many crayons does she have now?

To find the total number of crayons, we need to add 23 and 7.

We write the numbers one below the other according to their
place value and then add them.

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