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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 705 · 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. 1.11² =
  2. 2.28² =
  3. 3.25² =
  4. 4.16² =
  5. 5.15² =
  6. 6.29² =
  7. 7.19² =
  8. 8.21² =
  9. 9.14² =
  10. 10.26² =
  11. 11.22² =
  12. 12.27² =
  13. 13.13² =
  14. 14.18² =
  15. 15.12² =
  16. 16.23² =
  17. 17.12² =
  18. 18.17² =
  19. 19.24² =
  20. 20.22² =
  21. 21.22² =
  22. 22.26² =
  23. 23.11² =
  24. 24.12² =
  25. 25.27² =
  26. 26.17² =
  27. 27.12² =
  28. 28.13² =
  29. 29.12² =
  30. 30.14² =
  31. 31.16² =
  32. 32.21² =
  33. 33.11² =
  34. 34.23² =
  35. 35.29² =
  36. 36.11² =
  37. 37.14² =
  38. 38.22² =
  39. 39.16² =
  40. 40.28² =

Answer key

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

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