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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 323 · 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. 1.17² =
  2. 2.22² =
  3. 3.16² =
  4. 4.21² =
  5. 5.15² =
  6. 6.11² =
  7. 7.25² =
  8. 8.19² =
  9. 9.29² =
  10. 10.27² =
  11. 11.24² =
  12. 12.18² =
  13. 13.23² =
  14. 14.13² =
  15. 15.14² =
  16. 16.18² =
  17. 17.12² =
  18. 18.16² =
  19. 19.26² =
  20. 20.27² =
  21. 21.24² =
  22. 22.16² =
  23. 23.13² =
  24. 24.28² =
  25. 25.21² =
  26. 26.24² =
  27. 27.29² =
  28. 28.18² =
  29. 29.15² =
  30. 30.23² =
  31. 31.14² =
  32. 32.28² =
  33. 33.21² =
  34. 34.13² =
  35. 35.11² =
  36. 36.18² =
  37. 37.21² =
  38. 38.21² =
  39. 39.17² =
  40. 40.22² =

Answer key

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

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