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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 262 · 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. 1.17² =
  2. 2.13² =
  3. 3.24² =
  4. 4.15² =
  5. 5.14² =
  6. 6.23² =
  7. 7.28² =
  8. 8.26² =
  9. 9.16² =
  10. 10.25² =
  11. 11.22² =
  12. 12.21² =
  13. 13.11² =
  14. 14.18² =
  15. 15.29² =
  16. 16.11² =
  17. 17.12² =
  18. 18.19² =
  19. 19.29² =
  20. 20.27² =
  21. 21.19² =
  22. 22.14² =
  23. 23.17² =
  24. 24.15² =
  25. 25.13² =
  26. 26.14² =
  27. 27.11² =
  28. 28.27² =
  29. 29.23² =
  30. 30.23² =
  31. 31.21² =
  32. 32.22² =
  33. 33.26² =
  34. 34.21² =
  35. 35.11² =
  36. 36.21² =
  37. 37.12² =
  38. 38.25² =
  39. 39.19² =
  40. 40.16² =

Answer key

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

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