Add Three 3-Digit Numbers in Columns Worksheets for 3rd Grade
Add three 3-digit numbers stacked in columns, with sums up to 1,000. 15 free printable worksheets, each with an answer key.
Save to PinterestFree Add Three 3-Digit Numbers in Columns Worksheets
Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Add Three 3-Digit Numbers in Columns: what children learn
Adding three numbers in columns works one place at a time, and the ones or tens may add to 20 or more, so more than one ten or hundred can be carried. For 128 + 245 + 306, 8 + 5 + 6 = 19 ones, so write 9 and carry 1 ten.
Add Three 3-Digit Numbers in Columns: worked example
128 + 245 + 306 = 679
8 + 5 + 6 = 19 ones: write 9 and carry 1 ten. 1 + 2 + 4 + 0 = 7 tens. 1 + 2 + 3 = 6 hundreds. So 128 + 245 + 306 = 679.
Add Three 3-Digit Numbers in Columns: a common mistake to watch for
Kids often forget to carry, or carry to the wrong column.
Add Three 3-Digit Numbers in Columns: how to help at home or in class
Squared paper keeps three stacked numbers honest, with one digit in each box. Ask your child to write each carried digit small, above the next column, in a different colour so it is easy to spot and add in. Begin with sums where only the ones carry, such as 114 + 232 + 127, then mix in problems where the tens carry too. When carries appear without a reminder and answers hold up when the numbers are added in reverse order, move on to four numbers.
What is on these Add Three 3-Digit Numbers in Columns worksheets
This set has 15 different worksheets for 3rd grade, with 12 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Add the numbers in columns and write the sum.”
Example questions like the ones on these worksheets, with their answers:
- 594 + 195 + 179 = 968968
- 195 + 396 + 312 = 903903
- 121 + 176 + 535 = 832832
- 186 + 197 + 420 = 803803
- 459 + 102 + 240 = 801801
- 182 + 141 + 330 = 653653
- 282 + 408 + 167 = 857857
- 244 + 120 + 151 = 515515
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