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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 876 · 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. 1.13² =
  2. 2.11² =
  3. 3.21² =
  4. 4.29² =
  5. 5.28² =
  6. 6.16² =
  7. 7.15² =
  8. 8.14² =
  9. 9.18² =
  10. 10.27² =
  11. 11.26² =
  12. 12.25² =
  13. 13.22² =
  14. 14.17² =
  15. 15.23² =
  16. 16.19² =
  17. 17.24² =
  18. 18.12² =
  19. 19.23² =
  20. 20.22² =
  21. 21.23² =
  22. 22.15² =
  23. 23.19² =
  24. 24.19² =
  25. 25.18² =
  26. 26.26² =
  27. 27.24² =
  28. 28.11² =
  29. 29.13² =
  30. 30.17² =
  31. 31.11² =
  32. 32.29² =
  33. 33.21² =
  34. 34.21² =
  35. 35.23² =
  36. 36.26² =
  37. 37.19² =
  38. 38.17² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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