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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 790 · 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. 2.18² =
  3. 3.17² =
  4. 4.11² =
  5. 5.12² =
  6. 6.13² =
  7. 7.23² =
  8. 8.24² =
  9. 9.27² =
  10. 10.28² =
  11. 11.22² =
  12. 12.19² =
  13. 13.16² =
  14. 14.15² =
  15. 15.14² =
  16. 16.29² =
  17. 17.25² =
  18. 18.26² =
  19. 19.28² =
  20. 20.13² =
  21. 21.12² =
  22. 22.11² =
  23. 23.11² =
  24. 24.22² =
  25. 25.13² =
  26. 26.22² =
  27. 27.11² =
  28. 28.28² =
  29. 29.21² =
  30. 30.11² =
  31. 31.26² =
  32. 32.11² =
  33. 33.27² =
  34. 34.25² =
  35. 35.12² =
  36. 36.25² =
  37. 37.18² =
  38. 38.11² =
  39. 39.28² =
  40. 40.24² =

Answer key

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

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