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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 815 · 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. 1.23² =
  2. 2.16² =
  3. 3.25² =
  4. 4.29² =
  5. 5.18² =
  6. 6.21² =
  7. 7.15² =
  8. 8.14² =
  9. 9.28² =
  10. 10.22² =
  11. 11.13² =
  12. 12.24² =
  13. 13.26² =
  14. 14.17² =
  15. 15.27² =
  16. 16.12² =
  17. 17.27² =
  18. 18.19² =
  19. 19.11² =
  20. 20.24² =
  21. 21.14² =
  22. 22.28² =
  23. 23.29² =
  24. 24.19² =
  25. 25.21² =
  26. 26.15² =
  27. 27.29² =
  28. 28.13² =
  29. 29.24² =
  30. 30.21² =
  31. 31.21² =
  32. 32.25² =
  33. 33.15² =
  34. 34.26² =
  35. 35.22² =
  36. 36.29² =
  37. 37.21² =
  38. 38.14² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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