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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 44 · 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. 3.29² =
  4. 4.14² =
  5. 5.23² =
  6. 6.28² =
  7. 7.24² =
  8. 8.25² =
  9. 9.26² =
  10. 10.21² =
  11. 11.17² =
  12. 12.19² =
  13. 13.22² =
  14. 14.15² =
  15. 15.11² =
  16. 16.12² =
  17. 17.27² =
  18. 18.18² =
  19. 19.24² =
  20. 20.29² =
  21. 21.23² =
  22. 22.19² =
  23. 23.11² =
  24. 24.29² =
  25. 25.12² =
  26. 26.11² =
  27. 27.17² =
  28. 28.24² =
  29. 29.16² =
  30. 30.13² =
  31. 31.11² =
  32. 32.29² =
  33. 33.14² =
  34. 34.21² =
  35. 35.28² =
  36. 36.25² =
  37. 37.19² =
  38. 38.15² =
  39. 39.17² =
  40. 40.29² =

Answer key

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

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