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\ 12-Sep-2024 Surender Prajapati Proof-4 Reader’s Sign _______________________ Date __________

2. Find the sum by expanding the addends.

(a) 217 + 562 (b) 481 + 318 (c) 645 + 152
(d) 516 + 273 (e) 424 + 263 (f) 385 + 512

Addition of 3-digit numbers with regrouping

Addition of 3-digit numbers by regrouping ones

When we have more than 9 ones, say 12 ones, we can regrouped 12 ones into 1 ten and
2 ones. For Example,

Similarly, 2 tens 16 ones can be regroup as
3 tens 6 ones as shown below.

1 ten 12 ones 2 tens 2 ones 2 tens 16 ones 3 tens 6 ones

Rohit’s father runs a bakery shop.
His father got an order of 629 cheese pastries and 353 chocolate pastries.

rohit: How many total pastries will you make, father?

Father: I will make 982 pastries in total.

rohit: How?
Father: By adding 629 and 353.

Let us learn, how Rohit’s father added 629 and 353.

Write the numbers in the place value column.
Step 1: Add the ones. H t O

9 + 3 = 12 ones. 1
Regroup 12 ones into 1 ten and 2 ones. 6 2 9

Write 2 in ones column and carry over 1 ten to the tens column. + 3 5 3
2

Step 2: Add the tens. H t O
1 (carried over) + 2 + 5 = 8 tens 1

Write 8 in tens column. 6 2 9
+ 3 5 3
8 2

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