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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 635 · 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. 1.28² =
  2. 2.23² =
  3. 3.21² =
  4. 4.29² =
  5. 5.24² =
  6. 6.18² =
  7. 7.16² =
  8. 8.19² =
  9. 9.25² =
  10. 10.14² =
  11. 11.17² =
  12. 12.27² =
  13. 13.12² =
  14. 14.13² =
  15. 15.15² =
  16. 16.11² =
  17. 17.26² =
  18. 18.28² =
  19. 19.22² =
  20. 20.29² =
  21. 21.12² =
  22. 22.19² =
  23. 23.21² =
  24. 24.23² =
  25. 25.13² =
  26. 26.15² =
  27. 27.11² =
  28. 28.28² =
  29. 29.27² =
  30. 30.12² =
  31. 31.23² =
  32. 32.25² =
  33. 33.24² =
  34. 34.21² =
  35. 35.15² =
  36. 36.22² =
  37. 37.28² =
  38. 38.21² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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