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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 68 · 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. 1.23² =
  2. 2.25² =
  3. 3.27² =
  4. 4.22² =
  5. 5.28² =
  6. 6.15² =
  7. 7.26² =
  8. 8.21² =
  9. 9.19² =
  10. 10.29² =
  11. 11.13² =
  12. 12.12² =
  13. 13.14² =
  14. 14.24² =
  15. 15.11² =
  16. 16.17² =
  17. 17.18² =
  18. 18.17² =
  19. 19.16² =
  20. 20.25² =
  21. 21.14² =
  22. 22.15² =
  23. 23.21² =
  24. 24.18² =
  25. 25.14² =
  26. 26.11² =
  27. 27.12² =
  28. 28.12² =
  29. 29.29² =
  30. 30.11² =
  31. 31.27² =
  32. 32.18² =
  33. 33.23² =
  34. 34.11² =
  35. 35.11² =
  36. 36.11² =
  37. 37.25² =
  38. 38.19² =
  39. 39.12² =
  40. 40.22² =

Answer key

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

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