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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 566 · 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. 1.21² =
  2. 2.26² =
  3. 3.17² =
  4. 4.27² =
  5. 5.29² =
  6. 6.23² =
  7. 7.11² =
  8. 8.12² =
  9. 9.16² =
  10. 10.13² =
  11. 11.28² =
  12. 12.14² =
  13. 13.19² =
  14. 14.25² =
  15. 15.24² =
  16. 16.15² =
  17. 17.22² =
  18. 18.18² =
  19. 19.26² =
  20. 20.11² =
  21. 21.16² =
  22. 22.11² =
  23. 23.28² =
  24. 24.19² =
  25. 25.16² =
  26. 26.23² =
  27. 27.12² =
  28. 28.18² =
  29. 29.27² =
  30. 30.19² =
  31. 31.14² =
  32. 32.26² =
  33. 33.29² =
  34. 34.13² =
  35. 35.22² =
  36. 36.19² =
  37. 37.12² =
  38. 38.13² =
  39. 39.26² =
  40. 40.13² =

Answer key

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

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