Add Tens to 3-Digit Numbers Worksheets for 2nd Grade
Add a whole ten to a 3-digit number, like 347 + 30. 15 free printable worksheets, each with an answer key.
Save to PinterestFree Add Tens to 3-Digit Numbers 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 Tens to 3-Digit Numbers: what children learn
Adding tens to a three-digit number changes the tens digit, and sometimes the hundreds too. For 347 + 30 = 377 only the tens change, but 380 + 40 = 420 crosses a hundred.
Add Tens to 3-Digit Numbers: worked example
347 + 30 = 377
Add 3 tens to 4 tens: 4 + 3 = 7 tens. The hundreds and ones stay the same, so the answer is 377.
Add Tens to 3-Digit Numbers: a common mistake to watch for
Kids sometimes change the ones digit instead of the tens digit.
Add Tens to 3-Digit Numbers: how to help at home or in class
Draw a place-value chart with hundreds, tens and ones columns and write a three-digit number in it using digit cards. Slide extra tens into the tens column one at a time and watch that digit climb. When it passes 9 tens, ask what happens: ten tens turn into a new hundred. Try crossings such as 270 + 60. Your child is ready to move on when they can predict which digits stay unchanged before they start.
What is on these Add Tens to 3-Digit Numbers worksheets
This set has 15 different worksheets for 2nd grade, with 21 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Add and write the answer.”
Example questions like the ones on these worksheets, with their answers:
- 567 + 90 =657
- 349 + 50 =399
- 221 + 40 =261
- 385 + 90 =475
- 138 + 30 =168
- 476 + 60 =536
- 270 + 20 =290
- 440 + 20 =460
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers