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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 489 · 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. 1.14² =
  2. 2.11² =
  3. 3.22² =
  4. 4.21² =
  5. 5.27² =
  6. 6.15² =
  7. 7.29² =
  8. 8.25² =
  9. 9.19² =
  10. 10.13² =
  11. 11.12² =
  12. 12.28² =
  13. 13.17² =
  14. 14.18² =
  15. 15.23² =
  16. 16.14² =
  17. 17.15² =
  18. 18.26² =
  19. 19.16² =
  20. 20.13² =
  21. 21.12² =
  22. 22.23² =
  23. 23.21² =
  24. 24.15² =
  25. 25.24² =
  26. 26.21² =
  27. 27.16² =
  28. 28.15² =
  29. 29.13² =
  30. 30.13² =
  31. 31.15² =
  32. 32.24² =
  33. 33.11² =
  34. 34.11² =
  35. 35.23² =
  36. 36.27² =
  37. 37.15² =
  38. 38.29² =
  39. 39.14² =
  40. 40.23² =

Answer key

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

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