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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 135 · 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. 1.14² =
  2. 2.18² =
  3. 3.21² =
  4. 4.15² =
  5. 5.11² =
  6. 6.26² =
  7. 7.28² =
  8. 8.24² =
  9. 9.22² =
  10. 10.27² =
  11. 11.13² =
  12. 12.19² =
  13. 13.29² =
  14. 14.25² =
  15. 15.16² =
  16. 16.12² =
  17. 17.25² =
  18. 18.17² =
  19. 19.23² =
  20. 20.26² =
  21. 21.29² =
  22. 22.21² =
  23. 23.24² =
  24. 24.28² =
  25. 25.28² =
  26. 26.24² =
  27. 27.12² =
  28. 28.16² =
  29. 29.11² =
  30. 30.13² =
  31. 31.11² =
  32. 32.27² =
  33. 33.12² =
  34. 34.11² =
  35. 35.12² =
  36. 36.18² =
  37. 37.17² =
  38. 38.22² =
  39. 39.13² =
  40. 40.14² =

Answer key

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

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