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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 10 · 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. 1.13² =
  2. 2.18² =
  3. 3.11² =
  4. 4.14² =
  5. 5.28² =
  6. 6.23² =
  7. 7.27² =
  8. 8.15² =
  9. 9.17² =
  10. 10.12² =
  11. 11.16² =
  12. 12.29² =
  13. 13.25² =
  14. 14.19² =
  15. 15.21² =
  16. 16.24² =
  17. 17.21² =
  18. 18.26² =
  19. 19.12² =
  20. 20.22² =
  21. 21.13² =
  22. 22.13² =
  23. 23.16² =
  24. 24.14² =
  25. 25.26² =
  26. 26.26² =
  27. 27.25² =
  28. 28.26² =
  29. 29.24² =
  30. 30.14² =
  31. 31.14² =
  32. 32.11² =
  33. 33.21² =
  34. 34.13² =
  35. 35.15² =
  36. 36.21² =
  37. 37.21² =
  38. 38.27² =
  39. 39.12² =
  40. 40.11² =

Answer key

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

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