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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 674 · 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. 2.22² =
  3. 3.29² =
  4. 4.24² =
  5. 5.21² =
  6. 6.11² =
  7. 7.26² =
  8. 8.16² =
  9. 9.13² =
  10. 10.19² =
  11. 11.14² =
  12. 12.18² =
  13. 13.17² =
  14. 14.15² =
  15. 15.26² =
  16. 16.23² =
  17. 17.12² =
  18. 18.27² =
  19. 19.28² =
  20. 20.21² =
  21. 21.23² =
  22. 22.21² =
  23. 23.28² =
  24. 24.16² =
  25. 25.16² =
  26. 26.18² =
  27. 27.15² =
  28. 28.22² =
  29. 29.29² =
  30. 30.13² =
  31. 31.16² =
  32. 32.21² =
  33. 33.18² =
  34. 34.18² =
  35. 35.13² =
  36. 36.28² =
  37. 37.24² =
  38. 38.12² =
  39. 39.25² =
  40. 40.23² =

Answer key

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

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