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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 52 · 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. 1.23² =
  2. 2.21² =
  3. 3.26² =
  4. 4.13² =
  5. 5.17² =
  6. 6.12² =
  7. 7.11² =
  8. 8.16² =
  9. 9.18² =
  10. 10.25² =
  11. 11.14² =
  12. 12.28² =
  13. 13.15² =
  14. 14.27² =
  15. 15.22² =
  16. 16.24² =
  17. 17.19² =
  18. 18.29² =
  19. 19.15² =
  20. 20.23² =
  21. 21.21² =
  22. 22.12² =
  23. 23.21² =
  24. 24.14² =
  25. 25.19² =
  26. 26.25² =
  27. 27.29² =
  28. 28.16² =
  29. 29.21² =
  30. 30.17² =
  31. 31.26² =
  32. 32.17² =
  33. 33.27² =
  34. 34.25² =
  35. 35.17² =
  36. 36.13² =
  37. 37.14² =
  38. 38.15² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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