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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 18 · 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. 2.21² =
  3. 3.16² =
  4. 4.13² =
  5. 5.15² =
  6. 6.14² =
  7. 7.23² =
  8. 8.29² =
  9. 9.24² =
  10. 10.12² =
  11. 11.26² =
  12. 12.17² =
  13. 13.27² =
  14. 14.19² =
  15. 15.18² =
  16. 16.28² =
  17. 17.22² =
  18. 18.15² =
  19. 19.11² =
  20. 20.25² =
  21. 21.28² =
  22. 22.21² =
  23. 23.21² =
  24. 24.13² =
  25. 25.14² =
  26. 26.24² =
  27. 27.21² =
  28. 28.23² =
  29. 29.12² =
  30. 30.28² =
  31. 31.18² =
  32. 32.11² =
  33. 33.17² =
  34. 34.11² =
  35. 35.25² =
  36. 36.23² =
  37. 37.14² =
  38. 38.21² =
  39. 39.13² =
  40. 40.15² =

Answer key

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

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