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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 350 · 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. 1.16² =
  2. 2.29² =
  3. 3.26² =
  4. 4.21² =
  5. 5.17² =
  6. 6.14² =
  7. 7.23² =
  8. 8.13² =
  9. 9.18² =
  10. 10.27² =
  11. 11.11² =
  12. 12.19² =
  13. 13.12² =
  14. 14.28² =
  15. 15.25² =
  16. 16.24² =
  17. 17.15² =
  18. 18.16² =
  19. 19.22² =
  20. 20.15² =
  21. 21.25² =
  22. 22.23² =
  23. 23.11² =
  24. 24.24² =
  25. 25.14² =
  26. 26.13² =
  27. 27.17² =
  28. 28.25² =
  29. 29.14² =
  30. 30.29² =
  31. 31.12² =
  32. 32.11² =
  33. 33.16² =
  34. 34.16² =
  35. 35.26² =
  36. 36.21² =
  37. 37.17² =
  38. 38.12² =
  39. 39.16² =
  40. 40.13² =

Answer key

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

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