Two-Digit Addition With Regrouping Worksheets

Using this page

Every question needs a carry: the ones add to 10 or more, as in 47 + 38, so ten ones are traded for one ten. Australian classrooms often call this trading and American ones call it regrouping or carrying. Some questions also cross 100. Set them in columns to practise the written method, or across the page for mental strategies such as adding the tens then the ones. Suits around Year 2 and Year 3 in Australia and Grade 2 in the US (Common Core 2.NBT.B.5), but use whatever level fits the child.

Tips

• Keep sessions short: one sheet of 10 to 20 questions a day beats a long session once a week.
• Mark the sheet together with the answer key and talk about the mistakes; each one shows what to practise next.
• Move to the next sheet when a child gets almost every question right without counting on fingers.
• Where it is offered, use the column layout for written methods and the across layout for mental strategies.

Worked example

47 + 38. Ones: 7 + 8 = 15. Write 5 in the ones and carry 1 ten. Tens: 4 + 3 + 1 carried = 8 tens. So 47 + 38 = 85. Mentally: 47 + 30 = 77, then 77 + 8 = 85.

Common mistakes

Forgetting the carried ten, giving 75 instead of 85. Write the small 1 above the tens column every time.

Writing 15 in the ones column, giving 715. Only one digit goes in each column.

How to use this generator

Choose the options above the sheet: the number of questions and the settings for this kind of worksheet. Every change makes a new sheet straight away, and New worksheet gives a different set of questions with the same settings.

Each sheet has a worksheet number printed at the top. Type the same number later, or keep the page link, to print exactly the same questions and answer key again. Leave Answer key page ticked to print the answers on a second page, then press Print. Every printed page carries the makekite logo and web address.

Common questions

Is regrouping the same as trading and carrying?
Yes. All three words describe swapping ten ones for one ten (or ten tens for one hundred) when a column adds to 10 or more.

How many questions should a child do?
Ten to twenty is plenty for daily practice. The 100-question drill sheet is for short timed practice once or twice a week.

Can I print the same worksheet again?
Yes. Note the worksheet number printed at the top, or keep the link in your browser's address bar, which ends with that number. Entering it later gives the same questions and answers.

Is it free?
Yes. There is no sign-up, and nothing you choose is sent anywhere: the sheets are made in your browser.