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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 797 · 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. 1.15² =
  2. 2.25² =
  3. 3.29² =
  4. 4.26² =
  5. 5.12² =
  6. 6.18² =
  7. 7.21² =
  8. 8.22² =
  9. 9.23² =
  10. 10.27² =
  11. 11.16² =
  12. 12.14² =
  13. 13.17² =
  14. 14.13² =
  15. 15.11² =
  16. 16.24² =
  17. 17.16² =
  18. 18.19² =
  19. 19.23² =
  20. 20.26² =
  21. 21.28² =
  22. 22.12² =
  23. 23.12² =
  24. 24.13² =
  25. 25.16² =
  26. 26.29² =
  27. 27.22² =
  28. 28.24² =
  29. 29.28² =
  30. 30.12² =
  31. 31.22² =
  32. 32.13² =
  33. 33.21² =
  34. 34.22² =
  35. 35.26² =
  36. 36.19² =
  37. 37.11² =
  38. 38.19² =
  39. 39.26² =
  40. 40.23² =

Answer key

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

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