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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 517 · 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. 3.14² =
  4. 4.11² =
  5. 5.24² =
  6. 6.21² =
  7. 7.23² =
  8. 8.22² =
  9. 9.26² =
  10. 10.25² =
  11. 11.17² =
  12. 12.19² =
  13. 13.15² =
  14. 14.28² =
  15. 15.27² =
  16. 16.12² =
  17. 17.16² =
  18. 18.21² =
  19. 19.29² =
  20. 20.18² =
  21. 21.24² =
  22. 22.21² =
  23. 23.11² =
  24. 24.19² =
  25. 25.13² =
  26. 26.26² =
  27. 27.13² =
  28. 28.21² =
  29. 29.28² =
  30. 30.21² =
  31. 31.24² =
  32. 32.17² =
  33. 33.11² =
  34. 34.13² =
  35. 35.22² =
  36. 36.18² =
  37. 37.15² =
  38. 38.14² =
  39. 39.21² =
  40. 40.27² =

Answer key

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

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