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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 420 · 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. 1.16² =
  2. 2.11² =
  3. 3.14² =
  4. 4.13² =
  5. 5.17² =
  6. 6.29² =
  7. 7.18² =
  8. 8.12² =
  9. 9.23² =
  10. 10.15² =
  11. 11.24² =
  12. 12.19² =
  13. 13.28² =
  14. 14.27² =
  15. 15.26² =
  16. 16.24² =
  17. 17.21² =
  18. 18.25² =
  19. 19.11² =
  20. 20.26² =
  21. 21.22² =
  22. 22.11² =
  23. 23.15² =
  24. 24.21² =
  25. 25.13² =
  26. 26.16² =
  27. 27.27² =
  28. 28.17² =
  29. 29.13² =
  30. 30.25² =
  31. 31.13² =
  32. 32.15² =
  33. 33.16² =
  34. 34.18² =
  35. 35.11² =
  36. 36.21² =
  37. 37.28² =
  38. 38.11² =
  39. 39.29² =
  40. 40.26² =

Answer key

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

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