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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 604 · 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. 1.18² =
  2. 2.13² =
  3. 3.22² =
  4. 4.17² =
  5. 5.12² =
  6. 6.19² =
  7. 7.26² =
  8. 8.23² =
  9. 9.14² =
  10. 10.29² =
  11. 11.16² =
  12. 12.21² =
  13. 13.24² =
  14. 14.25² =
  15. 15.11² =
  16. 16.16² =
  17. 17.15² =
  18. 18.19² =
  19. 19.28² =
  20. 20.27² =
  21. 21.11² =
  22. 22.11² =
  23. 23.23² =
  24. 24.13² =
  25. 25.19² =
  26. 26.12² =
  27. 27.15² =
  28. 28.14² =
  29. 29.17² =
  30. 30.12² =
  31. 31.12² =
  32. 32.26² =
  33. 33.12² =
  34. 34.21² =
  35. 35.27² =
  36. 36.11² =
  37. 37.13² =
  38. 38.27² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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