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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 610 · 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. 1.16² =
  2. 2.21² =
  3. 3.23² =
  4. 4.24² =
  5. 5.25² =
  6. 6.17² =
  7. 7.26² =
  8. 8.12² =
  9. 9.29² =
  10. 10.14² =
  11. 11.18² =
  12. 12.19² =
  13. 13.28² =
  14. 14.22² =
  15. 15.11² =
  16. 16.13² =
  17. 17.22² =
  18. 18.23² =
  19. 19.22² =
  20. 20.15² =
  21. 21.25² =
  22. 22.15² =
  23. 23.29² =
  24. 24.26² =
  25. 25.27² =
  26. 26.29² =
  27. 27.15² =
  28. 28.25² =
  29. 29.27² =
  30. 30.29² =
  31. 31.28² =
  32. 32.16² =
  33. 33.25² =
  34. 34.14² =
  35. 35.29² =
  36. 36.12² =
  37. 37.13² =
  38. 38.21² =
  39. 39.13² =
  40. 40.16² =

Answer key

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

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