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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 275 · 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. 2.17² =
  3. 3.14² =
  4. 4.11² =
  5. 5.23² =
  6. 6.26² =
  7. 7.27² =
  8. 8.13² =
  9. 9.28² =
  10. 10.21² =
  11. 11.15² =
  12. 12.12² =
  13. 13.22² =
  14. 14.16² =
  15. 15.25² =
  16. 16.18² =
  17. 17.24² =
  18. 18.16² =
  19. 19.25² =
  20. 20.29² =
  21. 21.29² =
  22. 22.12² =
  23. 23.25² =
  24. 24.13² =
  25. 25.19² =
  26. 26.18² =
  27. 27.19² =
  28. 28.14² =
  29. 29.25² =
  30. 30.11² =
  31. 31.16² =
  32. 32.25² =
  33. 33.27² =
  34. 34.13² =
  35. 35.12² =
  36. 36.22² =
  37. 37.12² =
  38. 38.28² =
  39. 39.23² =
  40. 40.14² =

Answer key

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

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