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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 251 · 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. 1.17² =
  2. 2.13² =
  3. 3.18² =
  4. 4.15² =
  5. 5.12² =
  6. 6.21² =
  7. 7.16² =
  8. 8.22² =
  9. 9.19² =
  10. 10.14² =
  11. 11.26² =
  12. 12.28² =
  13. 13.29² =
  14. 14.25² =
  15. 15.23² =
  16. 16.11² =
  17. 17.27² =
  18. 18.24² =
  19. 19.23² =
  20. 20.25² =
  21. 21.15² =
  22. 22.14² =
  23. 23.29² =
  24. 24.28² =
  25. 25.12² =
  26. 26.14² =
  27. 27.27² =
  28. 28.13² =
  29. 29.13² =
  30. 30.27² =
  31. 31.23² =
  32. 32.14² =
  33. 33.26² =
  34. 34.25² =
  35. 35.14² =
  36. 36.17² =
  37. 37.26² =
  38. 38.27² =
  39. 39.21² =
  40. 40.29² =

Answer key

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

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