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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 320 · 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. 1.29² =
  2. 2.19² =
  3. 3.26² =
  4. 4.22² =
  5. 5.21² =
  6. 6.24² =
  7. 7.28² =
  8. 8.11² =
  9. 9.15² =
  10. 10.23² =
  11. 11.13² =
  12. 12.17² =
  13. 13.14² =
  14. 14.12² =
  15. 15.25² =
  16. 16.16² =
  17. 17.21² =
  18. 18.24² =
  19. 19.18² =
  20. 20.14² =
  21. 21.15² =
  22. 22.27² =
  23. 23.22² =
  24. 24.29² =
  25. 25.23² =
  26. 26.13² =
  27. 27.11² =
  28. 28.15² =
  29. 29.12² =
  30. 30.27² =
  31. 31.25² =
  32. 32.21² =
  33. 33.19² =
  34. 34.19² =
  35. 35.13² =
  36. 36.29² =
  37. 37.11² =
  38. 38.15² =
  39. 39.25² =
  40. 40.16² =

Answer key

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

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