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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 32 · 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. 1.12² =
  2. 2.16² =
  3. 3.21² =
  4. 4.14² =
  5. 5.13² =
  6. 6.18² =
  7. 7.22² =
  8. 8.15² =
  9. 9.25² =
  10. 10.29² =
  11. 11.27² =
  12. 12.19² =
  13. 13.25² =
  14. 14.11² =
  15. 15.23² =
  16. 16.24² =
  17. 17.15² =
  18. 18.17² =
  19. 19.28² =
  20. 20.26² =
  21. 21.21² =
  22. 22.26² =
  23. 23.29² =
  24. 24.12² =
  25. 25.21² =
  26. 26.16² =
  27. 27.24² =
  28. 28.28² =
  29. 29.13² =
  30. 30.19² =
  31. 31.21² =
  32. 32.26² =
  33. 33.13² =
  34. 34.11² =
  35. 35.17² =
  36. 36.26² =
  37. 37.16² =
  38. 38.14² =
  39. 39.29² =
  40. 40.22² =

Answer key

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

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