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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 199 · 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. 1.13² =
  2. 2.16² =
  3. 3.21² =
  4. 4.11² =
  5. 5.19² =
  6. 6.17² =
  7. 7.22² =
  8. 8.15² =
  9. 9.26² =
  10. 10.12² =
  11. 11.25² =
  12. 12.27² =
  13. 13.23² =
  14. 14.14² =
  15. 15.18² =
  16. 16.13² =
  17. 17.28² =
  18. 18.29² =
  19. 19.22² =
  20. 20.11² =
  21. 21.14² =
  22. 22.29² =
  23. 23.24² =
  24. 24.12² =
  25. 25.13² =
  26. 26.21² =
  27. 27.16² =
  28. 28.19² =
  29. 29.12² =
  30. 30.29² =
  31. 31.21² =
  32. 32.14² =
  33. 33.12² =
  34. 34.29² =
  35. 35.15² =
  36. 36.13² =
  37. 37.29² =
  38. 38.14² =
  39. 39.16² =
  40. 40.15² =

Answer key

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

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