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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 732 · 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. 2.29² =
  3. 3.23² =
  4. 4.13² =
  5. 5.21² =
  6. 6.15² =
  7. 7.12² =
  8. 8.28² =
  9. 9.25² =
  10. 10.14² =
  11. 11.16² =
  12. 12.19² =
  13. 13.24² =
  14. 14.22² =
  15. 15.17² =
  16. 16.27² =
  17. 17.18² =
  18. 18.26² =
  19. 19.14² =
  20. 20.24² =
  21. 21.19² =
  22. 22.21² =
  23. 23.13² =
  24. 24.19² =
  25. 25.17² =
  26. 26.21² =
  27. 27.17² =
  28. 28.13² =
  29. 29.19² =
  30. 30.29² =
  31. 31.18² =
  32. 32.15² =
  33. 33.18² =
  34. 34.23² =
  35. 35.25² =
  36. 36.21² =
  37. 37.16² =
  38. 38.26² =
  39. 39.18² =
  40. 40.13² =

Answer key

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

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