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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 437 · 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. 1.21² =
  2. 2.11² =
  3. 3.17² =
  4. 4.27² =
  5. 5.26² =
  6. 6.18² =
  7. 7.25² =
  8. 8.16² =
  9. 9.29² =
  10. 10.12² =
  11. 11.14² =
  12. 12.23² =
  13. 13.22² =
  14. 14.19² =
  15. 15.28² =
  16. 16.13² =
  17. 17.13² =
  18. 18.15² =
  19. 19.24² =
  20. 20.29² =
  21. 21.29² =
  22. 22.28² =
  23. 23.27² =
  24. 24.14² =
  25. 25.12² =
  26. 26.24² =
  27. 27.11² =
  28. 28.22² =
  29. 29.12² =
  30. 30.15² =
  31. 31.29² =
  32. 32.21² =
  33. 33.27² =
  34. 34.25² =
  35. 35.18² =
  36. 36.12² =
  37. 37.26² =
  38. 38.11² =
  39. 39.11² =
  40. 40.11² =

Answer key

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

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