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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 646 · 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. 1.14² =
  2. 2.24² =
  3. 3.16² =
  4. 4.17² =
  5. 5.23² =
  6. 6.18² =
  7. 7.15² =
  8. 8.25² =
  9. 9.11² =
  10. 10.21² =
  11. 11.29² =
  12. 12.26² =
  13. 13.28² =
  14. 14.22² =
  15. 15.27² =
  16. 16.13² =
  17. 17.14² =
  18. 18.12² =
  19. 19.11² =
  20. 20.19² =
  21. 21.21² =
  22. 22.29² =
  23. 23.13² =
  24. 24.28² =
  25. 25.22² =
  26. 26.16² =
  27. 27.23² =
  28. 28.16² =
  29. 29.27² =
  30. 30.15² =
  31. 31.27² =
  32. 32.12² =
  33. 33.18² =
  34. 34.18² =
  35. 35.23² =
  36. 36.18² =
  37. 37.23² =
  38. 38.29² =
  39. 39.18² =
  40. 40.11² =

Answer key

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

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