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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 398 · 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. 1.28² =
  2. 2.27² =
  3. 3.22² =
  4. 4.23² =
  5. 5.14² =
  6. 6.21² =
  7. 7.15² =
  8. 8.26² =
  9. 9.18² =
  10. 10.24² =
  11. 11.17² =
  12. 12.11² =
  13. 13.12² =
  14. 14.29² =
  15. 15.13² =
  16. 16.16² =
  17. 17.19² =
  18. 18.25² =
  19. 19.17² =
  20. 20.11² =
  21. 21.15² =
  22. 22.19² =
  23. 23.13² =
  24. 24.16² =
  25. 25.14² =
  26. 26.23² =
  27. 27.28² =
  28. 28.18² =
  29. 29.16² =
  30. 30.15² =
  31. 31.13² =
  32. 32.15² =
  33. 33.28² =
  34. 34.14² =
  35. 35.22² =
  36. 36.11² =
  37. 37.27² =
  38. 38.11² =
  39. 39.11² =
  40. 40.26² =

Answer key

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

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