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example: Find the sum of: 623 + 64 + 200

Solution: Write the numbers in columns according to their place values and then
add them.

H t O Step 1. Add the ones.
6 2 3 3 + 4 + 0 = 7 ones

6 4 Step 2. Add the tens. Get it right!
2 + 6 + 0 = 8 tens
+ 2 0 0 Step 3. Add the hundreds. Add 507 and 32. H T O
H T O
8 8 7 6 + 2 = 8 hundreds 5 0 7 5 0 7
+ 3 2 + 3 2
8 2 7 7 5 3 9 3

Thus, 623 + 64 + 200 = 887.

practice time 4B

1. Add the following.

(a) H t O (b) H t O (c) H t O (d) H t O

3 3 5 6 1 3 4 0 4 3 0 0
+ 3 4 2 + 1 3 6 + 5 8 0 + 2 5 0

(e) H t O (f) H t O (g) H t O (h) H t O

2 6 7 3 2 4 9 7 5
3 2 4 3 5 0 1 2 3
+ 4 0 0 + 3 2 1 + 6 2 0 + 1

2. Write the numbers in columns and then add them.

(a) 400 + 9 (b) 126 + 52 (c) 273 + 103 + 2 (d) 260 + 14 + 5

H t O H t O H t O H t O

+ +

+ +

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