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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 599 · 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. 1.22² =
  2. 2.14² =
  3. 3.24² =
  4. 4.25² =
  5. 5.21² =
  6. 6.17² =
  7. 7.11² =
  8. 8.27² =
  9. 9.18² =
  10. 10.16² =
  11. 11.28² =
  12. 12.13² =
  13. 13.23² =
  14. 14.12² =
  15. 15.29² =
  16. 16.15² =
  17. 17.19² =
  18. 18.26² =
  19. 19.15² =
  20. 20.25² =
  21. 21.18² =
  22. 22.16² =
  23. 23.29² =
  24. 24.13² =
  25. 25.27² =
  26. 26.21² =
  27. 27.13² =
  28. 28.18² =
  29. 29.28² =
  30. 30.29² =
  31. 31.29² =
  32. 32.23² =
  33. 33.11² =
  34. 34.26² =
  35. 35.29² =
  36. 36.29² =
  37. 37.24² =
  38. 38.15² =
  39. 39.12² =
  40. 40.19² =

Answer key

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

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