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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 839 · 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. 1.27² =
  2. 2.14² =
  3. 3.11² =
  4. 4.29² =
  5. 5.16² =
  6. 6.13² =
  7. 7.15² =
  8. 8.22² =
  9. 9.28² =
  10. 10.21² =
  11. 11.24² =
  12. 12.12² =
  13. 13.17² =
  14. 14.25² =
  15. 15.18² =
  16. 16.26² =
  17. 17.27² =
  18. 18.28² =
  19. 19.19² =
  20. 20.29² =
  21. 21.23² =
  22. 22.16² =
  23. 23.17² =
  24. 24.15² =
  25. 25.25² =
  26. 26.14² =
  27. 27.25² =
  28. 28.27² =
  29. 29.29² =
  30. 30.28² =
  31. 31.19² =
  32. 32.13² =
  33. 33.18² =
  34. 34.16² =
  35. 35.16² =
  36. 36.16² =
  37. 37.26² =
  38. 38.19² =
  39. 39.19² =
  40. 40.19² =

Answer key

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

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