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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 919 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.21² =
  2. 2.29² =
  3. 3.26² =
  4. 4.24² =
  5. 5.23² =
  6. 6.11² =
  7. 7.13² =
  8. 8.18² =
  9. 9.27² =
  10. 10.16² =
  11. 11.14² =
  12. 12.25² =
  13. 13.17² =
  14. 14.22² =
  15. 15.12² =
  16. 16.28² =
  17. 17.15² =
  18. 18.19² =
  19. 19.22² =
  20. 20.16² =
  21. 21.13² =
  22. 22.19² =
  23. 23.13² =
  24. 24.12² =
  25. 25.21² =
  26. 26.21² =
  27. 27.11² =
  28. 28.12² =
  29. 29.19² =
  30. 30.13² =
  31. 31.29² =
  32. 32.18² =
  33. 33.12² =
  34. 34.16² =
  35. 35.14² =
  36. 36.23² =
  37. 37.27² =
  38. 38.11² =
  39. 39.23² =
  40. 40.28² =

Answer key

  1. 441
  2. 841
  3. 676
  4. 576
  5. 529
  6. 121
  7. 169
  8. 324
  9. 729
  10. 256
  11. 196
  12. 625
  13. 289
  14. 484
  15. 144
  16. 784
  17. 225
  18. 361
  19. 484
  20. 256
  21. 169
  22. 361
  23. 169
  24. 144
  25. 441
  26. 441
  27. 121
  28. 144
  29. 361
  30. 169
  31. 841
  32. 324
  33. 144
  34. 256
  35. 196
  36. 529
  37. 729
  38. 121
  39. 529
  40. 784

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