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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 126 · 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. 2.22² =
  3. 3.16² =
  4. 4.11² =
  5. 5.12² =
  6. 6.25² =
  7. 7.29² =
  8. 8.23² =
  9. 9.18² =
  10. 10.14² =
  11. 11.24² =
  12. 12.13² =
  13. 13.27² =
  14. 14.26² =
  15. 15.22² =
  16. 16.19² =
  17. 17.17² =
  18. 18.15² =
  19. 19.28² =
  20. 20.17² =
  21. 21.28² =
  22. 22.24² =
  23. 23.25² =
  24. 24.15² =
  25. 25.16² =
  26. 26.26² =
  27. 27.18² =
  28. 28.21² =
  29. 29.28² =
  30. 30.11² =
  31. 31.22² =
  32. 32.12² =
  33. 33.14² =
  34. 34.14² =
  35. 35.12² =
  36. 36.13² =
  37. 37.18² =
  38. 38.12² =
  39. 39.13² =
  40. 40.29² =

Answer key

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

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