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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 29 · 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. 1.26² =
  2. 2.11² =
  3. 3.14² =
  4. 4.18² =
  5. 5.19² =
  6. 6.24² =
  7. 7.21² =
  8. 8.13² =
  9. 9.15² =
  10. 10.25² =
  11. 11.27² =
  12. 12.16² =
  13. 13.22² =
  14. 14.12² =
  15. 15.28² =
  16. 16.29² =
  17. 17.14² =
  18. 18.12² =
  19. 19.14² =
  20. 20.28² =
  21. 21.12² =
  22. 22.14² =
  23. 23.23² =
  24. 24.17² =
  25. 25.26² =
  26. 26.15² =
  27. 27.29² =
  28. 28.27² =
  29. 29.26² =
  30. 30.19² =
  31. 31.26² =
  32. 32.22² =
  33. 33.14² =
  34. 34.24² =
  35. 35.21² =
  36. 36.17² =
  37. 37.24² =
  38. 38.26² =
  39. 39.21² =
  40. 40.24² =

Answer key

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

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