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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 31 · 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. 1.12² =
  2. 2.13² =
  3. 3.16² =
  4. 4.15² =
  5. 5.26² =
  6. 6.22² =
  7. 7.25² =
  8. 8.17² =
  9. 9.29² =
  10. 10.11² =
  11. 11.14² =
  12. 12.21² =
  13. 13.18² =
  14. 14.19² =
  15. 15.28² =
  16. 16.23² =
  17. 17.21² =
  18. 18.24² =
  19. 19.26² =
  20. 20.19² =
  21. 21.27² =
  22. 22.27² =
  23. 23.23² =
  24. 24.18² =
  25. 25.28² =
  26. 26.21² =
  27. 27.26² =
  28. 28.11² =
  29. 29.13² =
  30. 30.27² =
  31. 31.29² =
  32. 32.11² =
  33. 33.21² =
  34. 34.22² =
  35. 35.26² =
  36. 36.21² =
  37. 37.22² =
  38. 38.15² =
  39. 39.19² =
  40. 40.24² =

Answer key

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

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