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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 793 · 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. 1.26² =
  2. 2.16² =
  3. 3.23² =
  4. 4.14² =
  5. 5.15² =
  6. 6.27² =
  7. 7.24² =
  8. 8.22² =
  9. 9.12² =
  10. 10.17² =
  11. 11.28² =
  12. 12.25² =
  13. 13.29² =
  14. 14.21² =
  15. 15.13² =
  16. 16.19² =
  17. 17.11² =
  18. 18.15² =
  19. 19.15² =
  20. 20.16² =
  21. 21.18² =
  22. 22.21² =
  23. 23.21² =
  24. 24.12² =
  25. 25.23² =
  26. 26.21² =
  27. 27.17² =
  28. 28.29² =
  29. 29.13² =
  30. 30.21² =
  31. 31.28² =
  32. 32.25² =
  33. 33.21² =
  34. 34.11² =
  35. 35.12² =
  36. 36.22² =
  37. 37.25² =
  38. 38.22² =
  39. 39.27² =
  40. 40.23² =

Answer key

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

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