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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 62 · 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. 1.29² =
  2. 2.24² =
  3. 3.15² =
  4. 4.16² =
  5. 5.23² =
  6. 6.11² =
  7. 7.28² =
  8. 8.26² =
  9. 9.22² =
  10. 10.21² =
  11. 11.19² =
  12. 12.14² =
  13. 13.17² =
  14. 14.12² =
  15. 15.13² =
  16. 16.18² =
  17. 17.27² =
  18. 18.13² =
  19. 19.25² =
  20. 20.11² =
  21. 21.11² =
  22. 22.13² =
  23. 23.21² =
  24. 24.13² =
  25. 25.29² =
  26. 26.15² =
  27. 27.21² =
  28. 28.12² =
  29. 29.13² =
  30. 30.22² =
  31. 31.23² =
  32. 32.21² =
  33. 33.15² =
  34. 34.29² =
  35. 35.29² =
  36. 36.14² =
  37. 37.28² =
  38. 38.17² =
  39. 39.13² =
  40. 40.25² =

Answer key

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

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