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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 848 · 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. 2.28² =
  3. 3.24² =
  4. 4.14² =
  5. 5.21² =
  6. 6.16² =
  7. 7.13² =
  8. 8.22² =
  9. 9.25² =
  10. 10.23² =
  11. 11.12² =
  12. 12.19² =
  13. 13.26² =
  14. 14.15² =
  15. 15.18² =
  16. 16.29² =
  17. 17.27² =
  18. 18.17² =
  19. 19.22² =
  20. 20.25² =
  21. 21.18² =
  22. 22.25² =
  23. 23.15² =
  24. 24.21² =
  25. 25.21² =
  26. 26.14² =
  27. 27.13² =
  28. 28.19² =
  29. 29.15² =
  30. 30.12² =
  31. 31.14² =
  32. 32.14² =
  33. 33.17² =
  34. 34.12² =
  35. 35.25² =
  36. 36.24² =
  37. 37.12² =
  38. 38.19² =
  39. 39.28² =
  40. 40.16² =

Answer key

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

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