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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 43 · 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. 2.12² =
  3. 3.17² =
  4. 4.16² =
  5. 5.19² =
  6. 6.21² =
  7. 7.14² =
  8. 8.27² =
  9. 9.29² =
  10. 10.13² =
  11. 11.11² =
  12. 12.22² =
  13. 13.26² =
  14. 14.24² =
  15. 15.23² =
  16. 16.14² =
  17. 17.18² =
  18. 18.25² =
  19. 19.11² =
  20. 20.28² =
  21. 21.16² =
  22. 22.29² =
  23. 23.21² =
  24. 24.11² =
  25. 25.15² =
  26. 26.16² =
  27. 27.13² =
  28. 28.16² =
  29. 29.24² =
  30. 30.21² =
  31. 31.21² =
  32. 32.12² =
  33. 33.21² =
  34. 34.29² =
  35. 35.15² =
  36. 36.16² =
  37. 37.12² =
  38. 38.26² =
  39. 39.17² =
  40. 40.25² =

Answer key

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

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