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example 2: Add 382 and 474.
Solution: Write the numbers in place value columns.

Step 1: Add the ones. H t O
2 + 4 = 6 ones
Write 6 in the ones column. 3 8 2

+ 4 7 4
6

Step 2: Add the tens.
8 + 7 = 15 tens H t O

Regroup 15 tens into 1 hundred 1
5 tens. 3 8 2
+ 4 7 4
Write 5 in the tens column and
carry over 1 hundred to the 5 6

hundreds column.

Step 3: Add the hundreds.

1 (carried over) + 3 + 4 = 8 hundreds H t O
Write 8 in the hundreds column. 1 8 2
3
Thus, 382 + 474 = 856. + 4 7 4

8 5 6

regrouping tens and ones

example 3: Add 254 and 168.

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

4 + 8 = 12 ones 1
Regroup 12 ones into 1 ten and 2 ones. 2 5 4

Write 2 in the ones column and carry over 1 ten to + 1 6 8

the tens column. 2

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