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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 857 · 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. 2.15² =
  3. 3.11² =
  4. 4.29² =
  5. 5.17² =
  6. 6.24² =
  7. 7.22² =
  8. 8.23² =
  9. 9.25² =
  10. 10.18² =
  11. 11.27² =
  12. 12.12² =
  13. 13.21² =
  14. 14.16² =
  15. 15.19² =
  16. 16.13² =
  17. 17.28² =
  18. 18.11² =
  19. 19.26² =
  20. 20.18² =
  21. 21.17² =
  22. 22.25² =
  23. 23.21² =
  24. 24.28² =
  25. 25.27² =
  26. 26.15² =
  27. 27.11² =
  28. 28.14² =
  29. 29.28² =
  30. 30.26² =
  31. 31.29² =
  32. 32.15² =
  33. 33.27² =
  34. 34.24² =
  35. 35.29² =
  36. 36.22² =
  37. 37.16² =
  38. 38.19² =
  39. 39.23² =
  40. 40.29² =

Answer key

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

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