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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 648 · 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. 1.13² =
  2. 2.29² =
  3. 3.12² =
  4. 4.16² =
  5. 5.23² =
  6. 6.22² =
  7. 7.28² =
  8. 8.26² =
  9. 9.21² =
  10. 10.25² =
  11. 11.18² =
  12. 12.11² =
  13. 13.19² =
  14. 14.14² =
  15. 15.24² =
  16. 16.17² =
  17. 17.18² =
  18. 18.27² =
  19. 19.15² =
  20. 20.15² =
  21. 21.18² =
  22. 22.27² =
  23. 23.16² =
  24. 24.24² =
  25. 25.21² =
  26. 26.11² =
  27. 27.16² =
  28. 28.21² =
  29. 29.21² =
  30. 30.13² =
  31. 31.15² =
  32. 32.29² =
  33. 33.22² =
  34. 34.21² =
  35. 35.12² =
  36. 36.27² =
  37. 37.26² =
  38. 38.28² =
  39. 39.13² =
  40. 40.11² =

Answer key

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

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