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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 515 · 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. 2.29² =
  3. 3.19² =
  4. 4.21² =
  5. 5.16² =
  6. 6.27² =
  7. 7.26² =
  8. 8.18² =
  9. 9.28² =
  10. 10.22² =
  11. 11.24² =
  12. 12.12² =
  13. 13.25² =
  14. 14.11² =
  15. 15.23² =
  16. 16.14² =
  17. 17.19² =
  18. 18.17² =
  19. 19.13² =
  20. 20.15² =
  21. 21.11² =
  22. 22.21² =
  23. 23.17² =
  24. 24.22² =
  25. 25.18² =
  26. 26.21² =
  27. 27.11² =
  28. 28.17² =
  29. 29.13² =
  30. 30.17² =
  31. 31.17² =
  32. 32.19² =
  33. 33.28² =
  34. 34.18² =
  35. 35.26² =
  36. 36.28² =
  37. 37.25² =
  38. 38.25² =
  39. 39.29² =
  40. 40.29² =

Answer key

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

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