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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 810 · 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. 1.14² =
  2. 2.18² =
  3. 3.21² =
  4. 4.15² =
  5. 5.22² =
  6. 6.28² =
  7. 7.13² =
  8. 8.11² =
  9. 9.16² =
  10. 10.29² =
  11. 11.23² =
  12. 12.24² =
  13. 13.25² =
  14. 14.26² =
  15. 15.19² =
  16. 16.17² =
  17. 17.27² =
  18. 18.12² =
  19. 19.15² =
  20. 20.27² =
  21. 21.18² =
  22. 22.29² =
  23. 23.13² =
  24. 24.11² =
  25. 25.24² =
  26. 26.15² =
  27. 27.14² =
  28. 28.24² =
  29. 29.19² =
  30. 30.11² =
  31. 31.28² =
  32. 32.29² =
  33. 33.21² =
  34. 34.23² =
  35. 35.13² =
  36. 36.24² =
  37. 37.18² =
  38. 38.25² =
  39. 39.25² =
  40. 40.14² =

Answer key

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

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