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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 130 · 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. 1.21² =
  2. 2.27² =
  3. 3.19² =
  4. 4.22² =
  5. 5.29² =
  6. 6.18² =
  7. 7.12² =
  8. 8.16² =
  9. 9.25² =
  10. 10.28² =
  11. 11.13² =
  12. 12.14² =
  13. 13.24² =
  14. 14.26² =
  15. 15.17² =
  16. 16.15² =
  17. 17.11² =
  18. 18.27² =
  19. 19.23² =
  20. 20.11² =
  21. 21.12² =
  22. 22.12² =
  23. 23.15² =
  24. 24.19² =
  25. 25.28² =
  26. 26.26² =
  27. 27.12² =
  28. 28.14² =
  29. 29.25² =
  30. 30.25² =
  31. 31.14² =
  32. 32.26² =
  33. 33.21² =
  34. 34.11² =
  35. 35.23² =
  36. 36.25² =
  37. 37.13² =
  38. 38.11² =
  39. 39.28² =
  40. 40.11² =

Answer key

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

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