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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 706 · 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. 1.27² =
  2. 2.28² =
  3. 3.14² =
  4. 4.11² =
  5. 5.29² =
  6. 6.25² =
  7. 7.21² =
  8. 8.24² =
  9. 9.23² =
  10. 10.15² =
  11. 11.18² =
  12. 12.19² =
  13. 13.13² =
  14. 14.12² =
  15. 15.26² =
  16. 16.22² =
  17. 17.17² =
  18. 18.12² =
  19. 19.11² =
  20. 20.16² =
  21. 21.14² =
  22. 22.24² =
  23. 23.14² =
  24. 24.18² =
  25. 25.22² =
  26. 26.18² =
  27. 27.24² =
  28. 28.12² =
  29. 29.14² =
  30. 30.25² =
  31. 31.27² =
  32. 32.26² =
  33. 33.24² =
  34. 34.22² =
  35. 35.12² =
  36. 36.26² =
  37. 37.14² =
  38. 38.21² =
  39. 39.21² =
  40. 40.11² =

Answer key

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

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