LET’S TRY ONE
What is 1,234 + 2,153?
3387
1,234 + 2,153 = 3,387. Check: 3,387 − 2,153 = 1,234.
Learning steps & teaching tips
Use place value to calculate multi-digit sums and differences.
- Align places, not simply the left edges. Use an estimate and the inverse operation to check the calculation.
- 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
Try a question with a partner. Before choosing, explain your idea; after choosing, compare it with the explanation.
Align places, not simply the left edges. Use an estimate and the inverse operation to check the calculation.