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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 218 · 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. 1.26² =
  2. 2.11² =
  3. 3.12² =
  4. 4.17² =
  5. 5.28² =
  6. 6.24² =
  7. 7.23² =
  8. 8.16² =
  9. 9.14² =
  10. 10.15² =
  11. 11.27² =
  12. 12.21² =
  13. 13.25² =
  14. 14.29² =
  15. 15.13² =
  16. 16.22² =
  17. 17.21² =
  18. 18.19² =
  19. 19.13² =
  20. 20.12² =
  21. 21.18² =
  22. 22.11² =
  23. 23.13² =
  24. 24.13² =
  25. 25.18² =
  26. 26.17² =
  27. 27.16² =
  28. 28.21² =
  29. 29.29² =
  30. 30.16² =
  31. 31.12² =
  32. 32.11² =
  33. 33.21² =
  34. 34.12² =
  35. 35.13² =
  36. 36.21² =
  37. 37.13² =
  38. 38.27² =
  39. 39.16² =
  40. 40.21² =

Answer key

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

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