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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 859 · 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. 2.11² =
  3. 3.26² =
  4. 4.24² =
  5. 5.21² =
  6. 6.28² =
  7. 7.29² =
  8. 8.14² =
  9. 9.27² =
  10. 10.23² =
  11. 11.19² =
  12. 12.25² =
  13. 13.15² =
  14. 14.13² =
  15. 15.16² =
  16. 16.22² =
  17. 17.12² =
  18. 18.18² =
  19. 19.23² =
  20. 20.26² =
  21. 21.25² =
  22. 22.11² =
  23. 23.19² =
  24. 24.17² =
  25. 25.26² =
  26. 26.28² =
  27. 27.27² =
  28. 28.14² =
  29. 29.25² =
  30. 30.11² =
  31. 31.12² =
  32. 32.12² =
  33. 33.23² =
  34. 34.14² =
  35. 35.24² =
  36. 36.11² =
  37. 37.18² =
  38. 38.29² =
  39. 39.11² =
  40. 40.25² =

Answer key

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

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