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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 865 · 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. 1.13² =
  2. 2.18² =
  3. 3.19² =
  4. 4.21² =
  5. 5.12² =
  6. 6.25² =
  7. 7.14² =
  8. 8.22² =
  9. 9.24² =
  10. 10.16² =
  11. 11.17² =
  12. 12.11² =
  13. 13.15² =
  14. 14.26² =
  15. 15.29² =
  16. 16.28² =
  17. 17.23² =
  18. 18.27² =
  19. 19.13² =
  20. 20.14² =
  21. 21.27² =
  22. 22.24² =
  23. 23.22² =
  24. 24.23² =
  25. 25.26² =
  26. 26.15² =
  27. 27.27² =
  28. 28.11² =
  29. 29.25² =
  30. 30.22² =
  31. 31.27² =
  32. 32.26² =
  33. 33.13² =
  34. 34.29² =
  35. 35.14² =
  36. 36.11² =
  37. 37.27² =
  38. 38.11² =
  39. 39.13² =
  40. 40.24² =

Answer key

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

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