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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 65 · 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. 1.17² =
  2. 2.27² =
  3. 3.23² =
  4. 4.21² =
  5. 5.18² =
  6. 6.25² =
  7. 7.12² =
  8. 8.14² =
  9. 9.22² =
  10. 10.16² =
  11. 11.19² =
  12. 12.26² =
  13. 13.13² =
  14. 14.24² =
  15. 15.15² =
  16. 16.28² =
  17. 17.29² =
  18. 18.13² =
  19. 19.11² =
  20. 20.11² =
  21. 21.14² =
  22. 22.16² =
  23. 23.17² =
  24. 24.14² =
  25. 25.13² =
  26. 26.23² =
  27. 27.21² =
  28. 28.15² =
  29. 29.19² =
  30. 30.13² =
  31. 31.18² =
  32. 32.23² =
  33. 33.12² =
  34. 34.23² =
  35. 35.13² =
  36. 36.13² =
  37. 37.13² =
  38. 38.13² =
  39. 39.11² =
  40. 40.16² =

Answer key

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

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