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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 353 · 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. 1.11² =
  2. 2.22² =
  3. 3.12² =
  4. 4.17² =
  5. 5.14² =
  6. 6.23² =
  7. 7.27² =
  8. 8.29² =
  9. 9.21² =
  10. 10.18² =
  11. 11.28² =
  12. 12.25² =
  13. 13.24² =
  14. 14.16² =
  15. 15.15² =
  16. 16.26² =
  17. 17.13² =
  18. 18.24² =
  19. 19.19² =
  20. 20.11² =
  21. 21.28² =
  22. 22.13² =
  23. 23.11² =
  24. 24.17² =
  25. 25.21² =
  26. 26.14² =
  27. 27.28² =
  28. 28.16² =
  29. 29.23² =
  30. 30.21² =
  31. 31.28² =
  32. 32.21² =
  33. 33.28² =
  34. 34.12² =
  35. 35.12² =
  36. 36.16² =
  37. 37.21² =
  38. 38.25² =
  39. 39.11² =
  40. 40.22² =

Answer key

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

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