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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 818 · 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. 1.13² =
  2. 2.23² =
  3. 3.21² =
  4. 4.14² =
  5. 5.27² =
  6. 6.24² =
  7. 7.15² =
  8. 8.12² =
  9. 9.18² =
  10. 10.29² =
  11. 11.17² =
  12. 12.12² =
  13. 13.11² =
  14. 14.16² =
  15. 15.22² =
  16. 16.19² =
  17. 17.25² =
  18. 18.26² =
  19. 19.12² =
  20. 20.11² =
  21. 21.26² =
  22. 22.17² =
  23. 23.28² =
  24. 24.28² =
  25. 25.11² =
  26. 26.13² =
  27. 27.14² =
  28. 28.17² =
  29. 29.11² =
  30. 30.11² =
  31. 31.27² =
  32. 32.13² =
  33. 33.28² =
  34. 34.29² =
  35. 35.21² =
  36. 36.15² =
  37. 37.14² =
  38. 38.16² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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