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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 101 · 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. 1.21² =
  2. 2.23² =
  3. 3.22² =
  4. 4.15² =
  5. 5.19² =
  6. 6.18² =
  7. 7.14² =
  8. 8.24² =
  9. 9.16² =
  10. 10.11² =
  11. 11.27² =
  12. 12.29² =
  13. 13.17² =
  14. 14.26² =
  15. 15.12² =
  16. 16.28² =
  17. 17.25² =
  18. 18.22² =
  19. 19.23² =
  20. 20.28² =
  21. 21.21² =
  22. 22.26² =
  23. 23.29² =
  24. 24.13² =
  25. 25.18² =
  26. 26.17² =
  27. 27.28² =
  28. 28.12² =
  29. 29.25² =
  30. 30.17² =
  31. 31.21² =
  32. 32.11² =
  33. 33.27² =
  34. 34.14² =
  35. 35.14² =
  36. 36.18² =
  37. 37.25² =
  38. 38.23² =
  39. 39.26² =
  40. 40.27² =

Answer key

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

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