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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 567 · 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. 2.28² =
  3. 3.27² =
  4. 4.21² =
  5. 5.18² =
  6. 6.24² =
  7. 7.29² =
  8. 8.11² =
  9. 9.26² =
  10. 10.22² =
  11. 11.13² =
  12. 12.19² =
  13. 13.14² =
  14. 14.17² =
  15. 15.25² =
  16. 16.12² =
  17. 17.12² =
  18. 18.16² =
  19. 19.16² =
  20. 20.23² =
  21. 21.15² =
  22. 22.13² =
  23. 23.15² =
  24. 24.12² =
  25. 25.12² =
  26. 26.12² =
  27. 27.27² =
  28. 28.19² =
  29. 29.16² =
  30. 30.12² =
  31. 31.24² =
  32. 32.13² =
  33. 33.11² =
  34. 34.27² =
  35. 35.21² =
  36. 36.27² =
  37. 37.11² =
  38. 38.18² =
  39. 39.25² =
  40. 40.25² =

Answer key

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

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