LET’S TRY ONE
What is 63 − 28?
35
Exchange a ten: 13 − 8 = 5 ones, and 5 − 2 = 3 tens.
Learning steps & teaching tips
Find differences between two-digit numbers using place value.
- Exchange one ten for ten ones when there are too few ones to subtract.
- Work through the example. Explain how its evidence supports the answer.
- Try a new question; use the explanation to check your thinking.
Try it together
Write or draw your own example with different numbers. Solve it, then ask a partner to check the method as well as the answer.
Exchange one ten for ten ones when there are too few ones to subtract.