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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 512 · 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. 1.11² =
  2. 2.23² =
  3. 3.27² =
  4. 4.18² =
  5. 5.22² =
  6. 6.19² =
  7. 7.13² =
  8. 8.12² =
  9. 9.25² =
  10. 10.14² =
  11. 11.21² =
  12. 12.17² =
  13. 13.14² =
  14. 14.26² =
  15. 15.15² =
  16. 16.29² =
  17. 17.16² =
  18. 18.29² =
  19. 19.11² =
  20. 20.22² =
  21. 21.28² =
  22. 22.27² =
  23. 23.24² =
  24. 24.15² =
  25. 25.24² =
  26. 26.21² =
  27. 27.15² =
  28. 28.26² =
  29. 29.27² =
  30. 30.29² =
  31. 31.16² =
  32. 32.23² =
  33. 33.11² =
  34. 34.25² =
  35. 35.21² =
  36. 36.21² =
  37. 37.21² =
  38. 38.24² =
  39. 39.22² =
  40. 40.13² =

Answer key

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

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