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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 1 · 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. 1.21² =
  2. 2.14² =
  3. 3.27² =
  4. 4.13² =
  5. 5.16² =
  6. 6.29² =
  7. 7.18² =
  8. 8.11² =
  9. 9.22² =
  10. 10.15² =
  11. 11.25² =
  12. 12.17² =
  13. 13.12² =
  14. 14.28² =
  15. 15.23² =
  16. 16.26² =
  17. 17.24² =
  18. 18.23² =
  19. 19.19² =
  20. 20.24² =
  21. 21.15² =
  22. 22.13² =
  23. 23.16² =
  24. 24.27² =
  25. 25.24² =
  26. 26.15² =
  27. 27.16² =
  28. 28.29² =
  29. 29.27² =
  30. 30.29² =
  31. 31.29² =
  32. 32.15² =
  33. 33.17² =
  34. 34.11² =
  35. 35.21² =
  36. 36.11² =
  37. 37.22² =
  38. 38.13² =
  39. 39.21² =
  40. 40.26² =

Answer key

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

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