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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 653 · 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. 2.12² =
  3. 3.23² =
  4. 4.21² =
  5. 5.16² =
  6. 6.22² =
  7. 7.14² =
  8. 8.15² =
  9. 9.18² =
  10. 10.13² =
  11. 11.25² =
  12. 12.17² =
  13. 13.24² =
  14. 14.28² =
  15. 15.19² =
  16. 16.26² =
  17. 17.18² =
  18. 18.13² =
  19. 19.27² =
  20. 20.17² =
  21. 21.29² =
  22. 22.27² =
  23. 23.21² =
  24. 24.15² =
  25. 25.15² =
  26. 26.11² =
  27. 27.19² =
  28. 28.11² =
  29. 29.15² =
  30. 30.21² =
  31. 31.11² =
  32. 32.27² =
  33. 33.16² =
  34. 34.14² =
  35. 35.27² =
  36. 36.15² =
  37. 37.15² =
  38. 38.21² =
  39. 39.28² =
  40. 40.16² =

Answer key

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

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