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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 208 · 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. 1.29² =
  2. 2.17² =
  3. 3.12² =
  4. 4.18² =
  5. 5.15² =
  6. 6.13² =
  7. 7.11² =
  8. 8.28² =
  9. 9.27² =
  10. 10.22² =
  11. 11.19² =
  12. 12.14² =
  13. 13.17² =
  14. 14.21² =
  15. 15.23² =
  16. 16.25² =
  17. 17.24² =
  18. 18.16² =
  19. 19.15² =
  20. 20.23² =
  21. 21.18² =
  22. 22.27² =
  23. 23.14² =
  24. 24.28² =
  25. 25.19² =
  26. 26.26² =
  27. 27.11² =
  28. 28.26² =
  29. 29.25² =
  30. 30.11² =
  31. 31.14² =
  32. 32.19² =
  33. 33.21² =
  34. 34.11² =
  35. 35.12² =
  36. 36.14² =
  37. 37.21² =
  38. 38.18² =
  39. 39.15² =
  40. 40.14² =

Answer key

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

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