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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 681 · 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. 3.16² =
  4. 4.21² =
  5. 5.23² =
  6. 6.22² =
  7. 7.15² =
  8. 8.24² =
  9. 9.11² =
  10. 10.17² =
  11. 11.14² =
  12. 12.12² =
  13. 13.25² =
  14. 14.18² =
  15. 15.28² =
  16. 16.19² =
  17. 17.26² =
  18. 18.27² =
  19. 19.27² =
  20. 20.27² =
  21. 21.14² =
  22. 22.11² =
  23. 23.15² =
  24. 24.24² =
  25. 25.15² =
  26. 26.13² =
  27. 27.12² =
  28. 28.15² =
  29. 29.15² =
  30. 30.15² =
  31. 31.12² =
  32. 32.27² =
  33. 33.18² =
  34. 34.27² =
  35. 35.11² =
  36. 36.27² =
  37. 37.24² =
  38. 38.11² =
  39. 39.23² =
  40. 40.16² =

Answer key

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

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