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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 520 · 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. 2.13² =
  3. 3.27² =
  4. 4.21² =
  5. 5.16² =
  6. 6.23² =
  7. 7.11² =
  8. 8.19² =
  9. 9.26² =
  10. 10.22² =
  11. 11.25² =
  12. 12.18² =
  13. 13.28² =
  14. 14.15² =
  15. 15.18² =
  16. 16.17² =
  17. 17.14² =
  18. 18.12² =
  19. 19.27² =
  20. 20.11² =
  21. 21.22² =
  22. 22.24² =
  23. 23.29² =
  24. 24.11² =
  25. 25.14² =
  26. 26.13² =
  27. 27.21² =
  28. 28.27² =
  29. 29.13² =
  30. 30.14² =
  31. 31.15² =
  32. 32.29² =
  33. 33.17² =
  34. 34.21² =
  35. 35.26² =
  36. 36.25² =
  37. 37.22² =
  38. 38.26² =
  39. 39.28² =
  40. 40.16² =

Answer key

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

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