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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 683 · 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. 1.13² =
  2. 2.14² =
  3. 3.18² =
  4. 4.26² =
  5. 5.16² =
  6. 6.28² =
  7. 7.19² =
  8. 8.11² =
  9. 9.29² =
  10. 10.22² =
  11. 11.27² =
  12. 12.21² =
  13. 13.17² =
  14. 14.25² =
  15. 15.12² =
  16. 16.15² =
  17. 17.24² =
  18. 18.23² =
  19. 19.29² =
  20. 20.26² =
  21. 21.26² =
  22. 22.15² =
  23. 23.26² =
  24. 24.19² =
  25. 25.23² =
  26. 26.19² =
  27. 27.12² =
  28. 28.21² =
  29. 29.18² =
  30. 30.12² =
  31. 31.18² =
  32. 32.16² =
  33. 33.24² =
  34. 34.14² =
  35. 35.15² =
  36. 36.11² =
  37. 37.23² =
  38. 38.14² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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