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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 37 · 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. 2.21² =
  3. 3.24² =
  4. 4.26² =
  5. 5.13² =
  6. 6.16² =
  7. 7.11² =
  8. 8.25² =
  9. 9.29² =
  10. 10.14² =
  11. 11.28² =
  12. 12.12² =
  13. 13.17² =
  14. 14.22² =
  15. 15.27² =
  16. 16.18² =
  17. 17.16² =
  18. 18.11² =
  19. 19.26² =
  20. 20.19² =
  21. 21.15² =
  22. 22.14² =
  23. 23.23² =
  24. 24.11² =
  25. 25.28² =
  26. 26.25² =
  27. 27.26² =
  28. 28.28² =
  29. 29.27² =
  30. 30.27² =
  31. 31.19² =
  32. 32.21² =
  33. 33.15² =
  34. 34.27² =
  35. 35.21² =
  36. 36.25² =
  37. 37.23² =
  38. 38.13² =
  39. 39.18² =
  40. 40.14² =

Answer key

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

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