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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 457 · 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. 1.13² =
  2. 2.29² =
  3. 3.19² =
  4. 4.11² =
  5. 5.14² =
  6. 6.25² =
  7. 7.15² =
  8. 8.16² =
  9. 9.26² =
  10. 10.12² =
  11. 11.17² =
  12. 12.18² =
  13. 13.27² =
  14. 14.21² =
  15. 15.24² =
  16. 16.13² =
  17. 17.22² =
  18. 18.28² =
  19. 19.22² =
  20. 20.28² =
  21. 21.22² =
  22. 22.23² =
  23. 23.26² =
  24. 24.11² =
  25. 25.26² =
  26. 26.13² =
  27. 27.16² =
  28. 28.19² =
  29. 29.26² =
  30. 30.29² =
  31. 31.13² =
  32. 32.14² =
  33. 33.27² =
  34. 34.22² =
  35. 35.14² =
  36. 36.23² =
  37. 37.18² =
  38. 38.18² =
  39. 39.21² =
  40. 40.23² =

Answer key

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

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