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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 773 · 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. 1.21² =
  2. 2.26² =
  3. 3.24² =
  4. 4.17² =
  5. 5.11² =
  6. 6.16² =
  7. 7.13² =
  8. 8.18² =
  9. 9.23² =
  10. 10.27² =
  11. 11.12² =
  12. 12.29² =
  13. 13.15² =
  14. 14.14² =
  15. 15.19² =
  16. 16.22² =
  17. 17.28² =
  18. 18.28² =
  19. 19.21² =
  20. 20.18² =
  21. 21.25² =
  22. 22.28² =
  23. 23.21² =
  24. 24.19² =
  25. 25.21² =
  26. 26.12² =
  27. 27.27² =
  28. 28.23² =
  29. 29.18² =
  30. 30.19² =
  31. 31.13² =
  32. 32.16² =
  33. 33.21² =
  34. 34.11² =
  35. 35.24² =
  36. 36.14² =
  37. 37.27² =
  38. 38.29² =
  39. 39.12² =
  40. 40.14² =

Answer key

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

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