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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 864 · 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. 1.29² =
  2. 2.23² =
  3. 3.13² =
  4. 4.24² =
  5. 5.28² =
  6. 6.25² =
  7. 7.22² =
  8. 8.26² =
  9. 9.27² =
  10. 10.11² =
  11. 11.21² =
  12. 12.19² =
  13. 13.18² =
  14. 14.16² =
  15. 15.14² =
  16. 16.17² =
  17. 17.12² =
  18. 18.18² =
  19. 19.22² =
  20. 20.13² =
  21. 21.15² =
  22. 22.22² =
  23. 23.24² =
  24. 24.23² =
  25. 25.21² =
  26. 26.21² =
  27. 27.29² =
  28. 28.21² =
  29. 29.11² =
  30. 30.15² =
  31. 31.24² =
  32. 32.11² =
  33. 33.26² =
  34. 34.21² =
  35. 35.28² =
  36. 36.22² =
  37. 37.12² =
  38. 38.26² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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