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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 835 · 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. 1.19² =
  2. 2.25² =
  3. 3.28² =
  4. 4.11² =
  5. 5.21² =
  6. 6.17² =
  7. 7.27² =
  8. 8.16² =
  9. 9.18² =
  10. 10.29² =
  11. 11.24² =
  12. 12.12² =
  13. 13.22² =
  14. 14.14² =
  15. 15.23² =
  16. 16.26² =
  17. 17.25² =
  18. 18.15² =
  19. 19.13² =
  20. 20.25² =
  21. 21.29² =
  22. 22.16² =
  23. 23.16² =
  24. 24.17² =
  25. 25.19² =
  26. 26.29² =
  27. 27.11² =
  28. 28.18² =
  29. 29.25² =
  30. 30.19² =
  31. 31.24² =
  32. 32.17² =
  33. 33.11² =
  34. 34.27² =
  35. 35.17² =
  36. 36.19² =
  37. 37.26² =
  38. 38.16² =
  39. 39.23² =
  40. 40.11² =

Answer key

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

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