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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 676 · 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. 1.12² =
  2. 2.17² =
  3. 3.18² =
  4. 4.21² =
  5. 5.11² =
  6. 6.23² =
  7. 7.19² =
  8. 8.25² =
  9. 9.16² =
  10. 10.22² =
  11. 11.13² =
  12. 12.15² =
  13. 13.28² =
  14. 14.26² =
  15. 15.27² =
  16. 16.29² =
  17. 17.24² =
  18. 18.21² =
  19. 19.14² =
  20. 20.25² =
  21. 21.11² =
  22. 22.28² =
  23. 23.19² =
  24. 24.12² =
  25. 25.14² =
  26. 26.27² =
  27. 27.12² =
  28. 28.25² =
  29. 29.13² =
  30. 30.25² =
  31. 31.26² =
  32. 32.12² =
  33. 33.21² =
  34. 34.11² =
  35. 35.22² =
  36. 36.14² =
  37. 37.28² =
  38. 38.18² =
  39. 39.18² =
  40. 40.21² =

Answer key

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

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