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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 139 · 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. 1.25² =
  2. 2.12² =
  3. 3.29² =
  4. 4.17² =
  5. 5.28² =
  6. 6.14² =
  7. 7.26² =
  8. 8.18² =
  9. 9.23² =
  10. 10.16² =
  11. 11.21² =
  12. 12.15² =
  13. 13.13² =
  14. 14.22² =
  15. 15.19² =
  16. 16.27² =
  17. 17.24² =
  18. 18.11² =
  19. 19.24² =
  20. 20.11² =
  21. 21.15² =
  22. 22.26² =
  23. 23.28² =
  24. 24.22² =
  25. 25.18² =
  26. 26.11² =
  27. 27.15² =
  28. 28.13² =
  29. 29.17² =
  30. 30.27² =
  31. 31.23² =
  32. 32.25² =
  33. 33.17² =
  34. 34.25² =
  35. 35.18² =
  36. 36.17² =
  37. 37.16² =
  38. 38.24² =
  39. 39.21² =
  40. 40.24² =

Answer key

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

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