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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 532 · 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. 2.19² =
  3. 3.18² =
  4. 4.11² =
  5. 5.17² =
  6. 6.28² =
  7. 7.15² =
  8. 8.24² =
  9. 9.12² =
  10. 10.13² =
  11. 11.29² =
  12. 12.25² =
  13. 13.23² =
  14. 14.21² =
  15. 15.14² =
  16. 16.22² =
  17. 17.26² =
  18. 18.21² =
  19. 19.24² =
  20. 20.16² =
  21. 21.24² =
  22. 22.19² =
  23. 23.26² =
  24. 24.11² =
  25. 25.16² =
  26. 26.27² =
  27. 27.16² =
  28. 28.26² =
  29. 29.28² =
  30. 30.25² =
  31. 31.16² =
  32. 32.25² =
  33. 33.28² =
  34. 34.22² =
  35. 35.25² =
  36. 36.11² =
  37. 37.22² =
  38. 38.14² =
  39. 39.15² =
  40. 40.27² =

Answer key

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

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