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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 194 · 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. 1.22² =
  2. 2.29² =
  3. 3.23² =
  4. 4.18² =
  5. 5.12² =
  6. 6.19² =
  7. 7.21² =
  8. 8.13² =
  9. 9.26² =
  10. 10.16² =
  11. 11.15² =
  12. 12.17² =
  13. 13.24² =
  14. 14.25² =
  15. 15.14² =
  16. 16.28² =
  17. 17.11² =
  18. 18.11² =
  19. 19.27² =
  20. 20.25² =
  21. 21.18² =
  22. 22.21² =
  23. 23.27² =
  24. 24.26² =
  25. 25.25² =
  26. 26.22² =
  27. 27.23² =
  28. 28.22² =
  29. 29.12² =
  30. 30.19² =
  31. 31.29² =
  32. 32.19² =
  33. 33.15² =
  34. 34.29² =
  35. 35.12² =
  36. 36.24² =
  37. 37.27² =
  38. 38.21² =
  39. 39.15² =
  40. 40.18² =

Answer key

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

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