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Addition of Two 3-Digit Numbers
To add 3-digit numbers, first add the ones, then the tens and finally the hundreds.
Look at the given example.
H T O H T O H T O
2 5 3 2 5 3 2 5 3
+ 3 2 6 + 3 2 6 + 3 2 6
9 7 9 5 7 9
Step 1: Add the ones. Step 2: Add the tens. Step 3: Add the
3 + 6 = 9 5 + 2 = 7 hundreds.
2 + 3 = 5
3 Find the sum.
H T O H T O H T O
(a) 3 2 1 (b) 6 0 7 (c) 7 2 3
+ 2 6 8 + 2 8 1 + 2 5 6
H T O H T O H T O
(d) 5 1 6 (e) 4 0 0 (f) 2 8 4
+ 3 0 2 + 3 9 5 + 5 0 3
(g) 635 + 264 (h) 410 + 409 (i) 815 + 183
H T O H T O H T O
+ + +
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