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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 735 · 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. 2.21² =
  3. 3.15² =
  4. 4.19² =
  5. 5.26² =
  6. 6.27² =
  7. 7.11² =
  8. 8.18² =
  9. 9.29² =
  10. 10.24² =
  11. 11.17² =
  12. 12.12² =
  13. 13.25² =
  14. 14.28² =
  15. 15.16² =
  16. 16.14² =
  17. 17.13² =
  18. 18.23² =
  19. 19.12² =
  20. 20.15² =
  21. 21.28² =
  22. 22.24² =
  23. 23.24² =
  24. 24.23² =
  25. 25.19² =
  26. 26.28² =
  27. 27.25² =
  28. 28.26² =
  29. 29.26² =
  30. 30.11² =
  31. 31.19² =
  32. 32.16² =
  33. 33.13² =
  34. 34.13² =
  35. 35.23² =
  36. 36.21² =
  37. 37.21² =
  38. 38.15² =
  39. 39.26² =
  40. 40.14² =

Answer key

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

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