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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 853 · 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. 1.14² =
  2. 2.19² =
  3. 3.24² =
  4. 4.29² =
  5. 5.12² =
  6. 6.11² =
  7. 7.16² =
  8. 8.27² =
  9. 9.28² =
  10. 10.18² =
  11. 11.17² =
  12. 12.22² =
  13. 13.25² =
  14. 14.15² =
  15. 15.21² =
  16. 16.13² =
  17. 17.23² =
  18. 18.26² =
  19. 19.21² =
  20. 20.17² =
  21. 21.25² =
  22. 22.17² =
  23. 23.28² =
  24. 24.29² =
  25. 25.13² =
  26. 26.28² =
  27. 27.14² =
  28. 28.18² =
  29. 29.17² =
  30. 30.18² =
  31. 31.14² =
  32. 32.12² =
  33. 33.21² =
  34. 34.18² =
  35. 35.21² =
  36. 36.15² =
  37. 37.17² =
  38. 38.17² =
  39. 39.16² =
  40. 40.25² =

Answer key

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

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