Math 4 · Unit 13: Addition and subtraction · Cambridge Primary Maths Stage 4
13.1 Adding and subtracting efficiently
17 questions · e.g. 649 people go to a concert …
Questions
1. Worked example: work out 367 + 185.
Check- Check
3. Write an estimate for 128 − 62 (round each number to the nearest 10), then find the answer.
Check4. Do the same for 358 − 254: write an estimate, then find the answer.
Check5. Do the same for 548 − 392: write an estimate, then find the answer.
Check- Check
- Check
- Check
- Check
10. Subtract the largest 2-digit number from 200.
Check- Check
12. Darius spilt ink on his work: 732 − 3☐9 = 413. His answer is correct. What is the missing digit?
Check13. Write the missing digits: drag a digit into each empty square.
Fill the blanks with these.
Check- 789 − 456 = 333 and 579 − 468 = 111
- 789 − 456 = 333 and 597 − 468 = 111
- 798 − 456 = 333 and 579 − 468 = 111
- 978 − 654 = 333 and 759 − 684 = 111
- Check
- Check
- Check
- 545
- 791
- 86
- 463
- 437
- 814
- 355
- 109