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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 856 · 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. 1.28² =
  2. 2.26² =
  3. 3.13² =
  4. 4.14² =
  5. 5.12² =
  6. 6.27² =
  7. 7.19² =
  8. 8.21² =
  9. 9.24² =
  10. 10.17² =
  11. 11.29² =
  12. 12.18² =
  13. 13.15² =
  14. 14.22² =
  15. 15.23² =
  16. 16.16² =
  17. 17.28² =
  18. 18.11² =
  19. 19.14² =
  20. 20.25² =
  21. 21.17² =
  22. 22.15² =
  23. 23.21² =
  24. 24.29² =
  25. 25.11² =
  26. 26.19² =
  27. 27.13² =
  28. 28.21² =
  29. 29.21² =
  30. 30.14² =
  31. 31.25² =
  32. 32.26² =
  33. 33.11² =
  34. 34.19² =
  35. 35.18² =
  36. 36.19² =
  37. 37.25² =
  38. 38.12² =
  39. 39.29² =
  40. 40.13² =

Answer key

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

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