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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 118 · 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. 1.23² =
  2. 2.18² =
  3. 3.19² =
  4. 4.26² =
  5. 5.21² =
  6. 6.15² =
  7. 7.13² =
  8. 8.27² =
  9. 9.12² =
  10. 10.29² =
  11. 11.17² =
  12. 12.14² =
  13. 13.25² =
  14. 14.11² =
  15. 15.16² =
  16. 16.15² =
  17. 17.28² =
  18. 18.21² =
  19. 19.24² =
  20. 20.22² =
  21. 21.29² =
  22. 22.23² =
  23. 23.16² =
  24. 24.12² =
  25. 25.12² =
  26. 26.19² =
  27. 27.16² =
  28. 28.26² =
  29. 29.12² =
  30. 30.26² =
  31. 31.25² =
  32. 32.13² =
  33. 33.17² =
  34. 34.26² =
  35. 35.17² =
  36. 36.11² =
  37. 37.13² =
  38. 38.28² =
  39. 39.16² =
  40. 40.14² =

Answer key

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

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