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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 879 · 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. 2.16² =
  3. 3.13² =
  4. 4.18² =
  5. 5.12² =
  6. 6.15² =
  7. 7.11² =
  8. 8.22² =
  9. 9.24² =
  10. 10.26² =
  11. 11.27² =
  12. 12.17² =
  13. 13.28² =
  14. 14.25² =
  15. 15.23² =
  16. 16.19² =
  17. 17.29² =
  18. 18.14² =
  19. 19.24² =
  20. 20.28² =
  21. 21.29² =
  22. 22.23² =
  23. 23.26² =
  24. 24.11² =
  25. 25.14² =
  26. 26.11² =
  27. 27.22² =
  28. 28.12² =
  29. 29.13² =
  30. 30.11² =
  31. 31.12² =
  32. 32.13² =
  33. 33.23² =
  34. 34.25² =
  35. 35.23² =
  36. 36.19² =
  37. 37.15² =
  38. 38.15² =
  39. 39.17² =
  40. 40.26² =

Answer key

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

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