Work out 246 + 135 using column addition. What is the total?

In the usual column-addition method, why do we finish the ones before the tens?

• It lets us add any carried ten when we reach the tens
• It lets us ignore the tens until the hundreds are finished
• It lets us add ones digits as if each one were ten
• It lets us avoid carrying whenever the ones pass nine

You add two two-digit whole numbers in columns. The ones total more than 9. What should you do?

• Write the ones digit and carry one ten
• Write both digits together in the ones place
• Write the ones digit and drop the extra ten

If two whole numbers are both even, adding them always gives an even number.

Nia joins 9 counters and 6 counters. After making as many pairs as possible, how many counters are left without a partner?

Which pair shows that two odd numbers can add to an even number?

• 3 and 5
• 3 and 4
• 2 and 4

For 467 + 258, the tens step is 6 + 5 + 1 = 12 tens. We write 2 tens and carry 1 to the hundreds. What does that carried 1 mean?

• It means 10 ones moved into the hundreds column
• It means 1 one moved into the hundreds column
• It means 1 hundred made by grouping 10 tens
• It means 12 hundreds made by grouping 12 tens

Tom gets 79 for 35 + 24 using two methods. Both times he copies 24 as 44. Do the matching answers show that his answer to 35 + 24 is correct?

Ravi sets out 68 + 7 with 7 under the 6. He adds 6 + 7 = 13 tens and keeps 8 ones, giving 138. Which step first changes the value of 7?

• Keeping 8 as the ones digit of the total
• Putting 7 in the tens column
• Adding 6 + 7 after treating both digits as tens

A child writes 506 - 278 = 232. Check by adding the answer to the amount taken away. What is 232 + 278?