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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 360 · 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. 1.15² =
  2. 2.24² =
  3. 3.11² =
  4. 4.29² =
  5. 5.21² =
  6. 6.28² =
  7. 7.26² =
  8. 8.13² =
  9. 9.17² =
  10. 10.23² =
  11. 11.25² =
  12. 12.19² =
  13. 13.12² =
  14. 14.16² =
  15. 15.27² =
  16. 16.14² =
  17. 17.15² =
  18. 18.18² =
  19. 19.29² =
  20. 20.22² =
  21. 21.22² =
  22. 22.15² =
  23. 23.21² =
  24. 24.28² =
  25. 25.27² =
  26. 26.11² =
  27. 27.29² =
  28. 28.19² =
  29. 29.18² =
  30. 30.15² =
  31. 31.13² =
  32. 32.13² =
  33. 33.16² =
  34. 34.16² =
  35. 35.26² =
  36. 36.28² =
  37. 37.18² =
  38. 38.21² =
  39. 39.27² =
  40. 40.26² =

Answer key

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

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