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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 213 · 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. 1.28² =
  2. 2.29² =
  3. 3.24² =
  4. 4.12² =
  5. 5.15² =
  6. 6.22² =
  7. 7.25² =
  8. 8.14² =
  9. 9.19² =
  10. 10.23² =
  11. 11.21² =
  12. 12.16² =
  13. 13.13² =
  14. 14.18² =
  15. 15.27² =
  16. 16.26² =
  17. 17.11² =
  18. 18.17² =
  19. 19.15² =
  20. 20.21² =
  21. 21.21² =
  22. 22.28² =
  23. 23.11² =
  24. 24.11² =
  25. 25.13² =
  26. 26.28² =
  27. 27.22² =
  28. 28.28² =
  29. 29.27² =
  30. 30.25² =
  31. 31.11² =
  32. 32.21² =
  33. 33.26² =
  34. 34.18² =
  35. 35.15² =
  36. 36.22² =
  37. 37.17² =
  38. 38.12² =
  39. 39.13² =
  40. 40.13² =

Answer key

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

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