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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 645 · 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. 2.22² =
  3. 3.28² =
  4. 4.12² =
  5. 5.24² =
  6. 6.26² =
  7. 7.13² =
  8. 8.14² =
  9. 9.23² =
  10. 10.25² =
  11. 11.19² =
  12. 12.29² =
  13. 13.17² =
  14. 14.15² =
  15. 15.11² =
  16. 16.21² =
  17. 17.29² =
  18. 18.27² =
  19. 19.18² =
  20. 20.24² =
  21. 21.23² =
  22. 22.13² =
  23. 23.26² =
  24. 24.15² =
  25. 25.15² =
  26. 26.19² =
  27. 27.23² =
  28. 28.14² =
  29. 29.11² =
  30. 30.16² =
  31. 31.19² =
  32. 32.21² =
  33. 33.14² =
  34. 34.21² =
  35. 35.29² =
  36. 36.15² =
  37. 37.15² =
  38. 38.24² =
  39. 39.18² =
  40. 40.17² =

Answer key

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

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