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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 248 · 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. 1.27² =
  2. 2.25² =
  3. 3.17² =
  4. 4.11² =
  5. 5.12² =
  6. 6.29² =
  7. 7.15² =
  8. 8.22² =
  9. 9.18² =
  10. 10.21² =
  11. 11.26² =
  12. 12.24² =
  13. 13.16² =
  14. 14.14² =
  15. 15.19² =
  16. 16.13² =
  17. 17.21² =
  18. 18.11² =
  19. 19.28² =
  20. 20.23² =
  21. 21.12² =
  22. 22.26² =
  23. 23.22² =
  24. 24.13² =
  25. 25.14² =
  26. 26.29² =
  27. 27.14² =
  28. 28.19² =
  29. 29.15² =
  30. 30.17² =
  31. 31.27² =
  32. 32.12² =
  33. 33.18² =
  34. 34.25² =
  35. 35.26² =
  36. 36.13² =
  37. 37.24² =
  38. 38.11² =
  39. 39.26² =
  40. 40.25² =

Answer key

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

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