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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 481 · 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. 2.24² =
  3. 3.13² =
  4. 4.19² =
  5. 5.18² =
  6. 6.12² =
  7. 7.15² =
  8. 8.21² =
  9. 9.23² =
  10. 10.17² =
  11. 11.11² =
  12. 12.22² =
  13. 13.28² =
  14. 14.16² =
  15. 15.14² =
  16. 16.26² =
  17. 17.25² =
  18. 18.13² =
  19. 19.25² =
  20. 20.21² =
  21. 21.27² =
  22. 22.29² =
  23. 23.29² =
  24. 24.24² =
  25. 25.12² =
  26. 26.21² =
  27. 27.13² =
  28. 28.25² =
  29. 29.14² =
  30. 30.11² =
  31. 31.18² =
  32. 32.21² =
  33. 33.11² =
  34. 34.14² =
  35. 35.28² =
  36. 36.19² =
  37. 37.14² =
  38. 38.11² =
  39. 39.19² =
  40. 40.13² =

Answer key

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

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