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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 264 · 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. 1.22² =
  2. 2.15² =
  3. 3.24² =
  4. 4.13² =
  5. 5.26² =
  6. 6.23² =
  7. 7.21² =
  8. 8.27² =
  9. 9.11² =
  10. 10.16² =
  11. 11.12² =
  12. 12.29² =
  13. 13.25² =
  14. 14.28² =
  15. 15.19² =
  16. 16.18² =
  17. 17.13² =
  18. 18.17² =
  19. 19.23² =
  20. 20.14² =
  21. 21.23² =
  22. 22.18² =
  23. 23.11² =
  24. 24.18² =
  25. 25.24² =
  26. 26.17² =
  27. 27.19² =
  28. 28.29² =
  29. 29.15² =
  30. 30.18² =
  31. 31.17² =
  32. 32.17² =
  33. 33.22² =
  34. 34.21² =
  35. 35.11² =
  36. 36.26² =
  37. 37.12² =
  38. 38.26² =
  39. 39.21² =
  40. 40.23² =

Answer key

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

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