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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 689 · 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. 1.11² =
  2. 2.13² =
  3. 3.21² =
  4. 4.15² =
  5. 5.18² =
  6. 6.14² =
  7. 7.22² =
  8. 8.27² =
  9. 9.17² =
  10. 10.29² =
  11. 11.19² =
  12. 12.23² =
  13. 13.26² =
  14. 14.25² =
  15. 15.28² =
  16. 16.24² =
  17. 17.12² =
  18. 18.25² =
  19. 19.16² =
  20. 20.15² =
  21. 21.18² =
  22. 22.16² =
  23. 23.24² =
  24. 24.25² =
  25. 25.11² =
  26. 26.13² =
  27. 27.15² =
  28. 28.21² =
  29. 29.22² =
  30. 30.21² =
  31. 31.17² =
  32. 32.16² =
  33. 33.25² =
  34. 34.18² =
  35. 35.24² =
  36. 36.28² =
  37. 37.27² =
  38. 38.24² =
  39. 39.17² =
  40. 40.14² =

Answer key

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

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