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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 769 · 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. 1.22² =
  2. 2.27² =
  3. 3.18² =
  4. 4.29² =
  5. 5.14² =
  6. 6.21² =
  7. 7.13² =
  8. 8.11² =
  9. 9.23² =
  10. 10.24² =
  11. 11.17² =
  12. 12.25² =
  13. 13.12² =
  14. 14.15² =
  15. 15.16² =
  16. 16.26² =
  17. 17.19² =
  18. 18.13² =
  19. 19.15² =
  20. 20.28² =
  21. 21.23² =
  22. 22.27² =
  23. 23.18² =
  24. 24.23² =
  25. 25.17² =
  26. 26.15² =
  27. 27.15² =
  28. 28.25² =
  29. 29.15² =
  30. 30.29² =
  31. 31.11² =
  32. 32.26² =
  33. 33.21² =
  34. 34.25² =
  35. 35.22² =
  36. 36.27² =
  37. 37.27² =
  38. 38.21² =
  39. 39.17² =
  40. 40.27² =

Answer key

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

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