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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 657 · 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. 1.16² =
  2. 2.23² =
  3. 3.28² =
  4. 4.21² =
  5. 5.26² =
  6. 6.27² =
  7. 7.29² =
  8. 8.19² =
  9. 9.14² =
  10. 10.17² =
  11. 11.25² =
  12. 12.18² =
  13. 13.15² =
  14. 14.24² =
  15. 15.11² =
  16. 16.22² =
  17. 17.13² =
  18. 18.12² =
  19. 19.26² =
  20. 20.22² =
  21. 21.12² =
  22. 22.14² =
  23. 23.13² =
  24. 24.23² =
  25. 25.19² =
  26. 26.14² =
  27. 27.27² =
  28. 28.21² =
  29. 29.14² =
  30. 30.27² =
  31. 31.25² =
  32. 32.27² =
  33. 33.26² =
  34. 34.24² =
  35. 35.15² =
  36. 36.16² =
  37. 37.21² =
  38. 38.29² =
  39. 39.14² =
  40. 40.17² =

Answer key

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

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