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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 187 · 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. 1.29² =
  2. 2.18² =
  3. 3.24² =
  4. 4.12² =
  5. 5.26² =
  6. 6.19² =
  7. 7.11² =
  8. 8.27² =
  9. 9.21² =
  10. 10.15² =
  11. 11.22² =
  12. 12.23² =
  13. 13.14² =
  14. 14.16² =
  15. 15.19² =
  16. 16.15² =
  17. 17.28² =
  18. 18.25² =
  19. 19.22² =
  20. 20.13² =
  21. 21.21² =
  22. 22.14² =
  23. 23.21² =
  24. 24.14² =
  25. 25.19² =
  26. 26.24² =
  27. 27.17² =
  28. 28.23² =
  29. 29.18² =
  30. 30.26² =
  31. 31.22² =
  32. 32.29² =
  33. 33.14² =
  34. 34.26² =
  35. 35.21² =
  36. 36.13² =
  37. 37.19² =
  38. 38.28² =
  39. 39.11² =
  40. 40.24² =

Answer key

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

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