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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 761 · 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. 2.23² =
  3. 3.16² =
  4. 4.25² =
  5. 5.17² =
  6. 6.27² =
  7. 7.19² =
  8. 8.13² =
  9. 9.22² =
  10. 10.26² =
  11. 11.24² =
  12. 12.12² =
  13. 13.18² =
  14. 14.15² =
  15. 15.11² =
  16. 16.14² =
  17. 17.29² =
  18. 18.28² =
  19. 19.23² =
  20. 20.29² =
  21. 21.24² =
  22. 22.29² =
  23. 23.16² =
  24. 24.13² =
  25. 25.29² =
  26. 26.17² =
  27. 27.18² =
  28. 28.11² =
  29. 29.23² =
  30. 30.16² =
  31. 31.17² =
  32. 32.26² =
  33. 33.14² =
  34. 34.11² =
  35. 35.26² =
  36. 36.14² =
  37. 37.12² =
  38. 38.16² =
  39. 39.28² =
  40. 40.14² =

Answer key

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

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