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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 755 · 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. 2.16² =
  3. 3.27² =
  4. 4.19² =
  5. 5.17² =
  6. 6.11² =
  7. 7.22² =
  8. 8.26² =
  9. 9.21² =
  10. 10.12² =
  11. 11.14² =
  12. 12.28² =
  13. 13.15² =
  14. 14.29² =
  15. 15.13² =
  16. 16.24² =
  17. 17.18² =
  18. 18.27² =
  19. 19.28² =
  20. 20.21² =
  21. 21.27² =
  22. 22.21² =
  23. 23.24² =
  24. 24.25² =
  25. 25.14² =
  26. 26.19² =
  27. 27.14² =
  28. 28.22² =
  29. 29.21² =
  30. 30.21² =
  31. 31.23² =
  32. 32.26² =
  33. 33.21² =
  34. 34.14² =
  35. 35.23² =
  36. 36.27² =
  37. 37.16² =
  38. 38.11² =
  39. 39.16² =
  40. 40.24² =

Answer key

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

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