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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 74 · 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. 1.28² =
  2. 2.14² =
  3. 3.25² =
  4. 4.15² =
  5. 5.21² =
  6. 6.26² =
  7. 7.13² =
  8. 8.24² =
  9. 9.18² =
  10. 10.27² =
  11. 11.29² =
  12. 12.16² =
  13. 13.22² =
  14. 14.11² =
  15. 15.12² =
  16. 16.17² =
  17. 17.19² =
  18. 18.16² =
  19. 19.13² =
  20. 20.16² =
  21. 21.14² =
  22. 22.11² =
  23. 23.23² =
  24. 24.13² =
  25. 25.21² =
  26. 26.16² =
  27. 27.17² =
  28. 28.21² =
  29. 29.13² =
  30. 30.21² =
  31. 31.13² =
  32. 32.11² =
  33. 33.13² =
  34. 34.16² =
  35. 35.29² =
  36. 36.21² =
  37. 37.15² =
  38. 38.11² =
  39. 39.19² =
  40. 40.16² =

Answer key

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

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