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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 211 · 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. 1.29² =
  2. 2.18² =
  3. 3.27² =
  4. 4.15² =
  5. 5.12² =
  6. 6.21² =
  7. 7.11² =
  8. 8.14² =
  9. 9.23² =
  10. 10.22² =
  11. 11.13² =
  12. 12.16² =
  13. 13.24² =
  14. 14.26² =
  15. 15.25² =
  16. 16.17² =
  17. 17.19² =
  18. 18.28² =
  19. 19.24² =
  20. 20.23² =
  21. 21.19² =
  22. 22.17² =
  23. 23.24² =
  24. 24.21² =
  25. 25.28² =
  26. 26.17² =
  27. 27.29² =
  28. 28.27² =
  29. 29.21² =
  30. 30.27² =
  31. 31.11² =
  32. 32.14² =
  33. 33.23² =
  34. 34.17² =
  35. 35.28² =
  36. 36.13² =
  37. 37.15² =
  38. 38.13² =
  39. 39.16² =
  40. 40.14² =

Answer key

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

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