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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 296 · 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. 1.25² =
  2. 2.23² =
  3. 3.16² =
  4. 4.15² =
  5. 5.29² =
  6. 6.26² =
  7. 7.11² =
  8. 8.24² =
  9. 9.12² =
  10. 10.27² =
  11. 11.22² =
  12. 12.21² =
  13. 13.14² =
  14. 14.19² =
  15. 15.19² =
  16. 16.18² =
  17. 17.28² =
  18. 18.17² =
  19. 19.13² =
  20. 20.11² =
  21. 21.19² =
  22. 22.26² =
  23. 23.12² =
  24. 24.17² =
  25. 25.21² =
  26. 26.13² =
  27. 27.13² =
  28. 28.15² =
  29. 29.13² =
  30. 30.25² =
  31. 31.24² =
  32. 32.13² =
  33. 33.12² =
  34. 34.14² =
  35. 35.16² =
  36. 36.29² =
  37. 37.16² =
  38. 38.26² =
  39. 39.14² =
  40. 40.25² =

Answer key

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

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