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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 191 · 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. 2.29² =
  3. 3.14² =
  4. 4.16² =
  5. 5.17² =
  6. 6.28² =
  7. 7.21² =
  8. 8.18² =
  9. 9.25² =
  10. 10.15² =
  11. 11.26² =
  12. 12.12² =
  13. 13.27² =
  14. 14.11² =
  15. 15.19² =
  16. 16.22² =
  17. 17.22² =
  18. 18.23² =
  19. 19.22² =
  20. 20.17² =
  21. 21.11² =
  22. 22.18² =
  23. 23.26² =
  24. 24.21² =
  25. 25.13² =
  26. 26.24² =
  27. 27.24² =
  28. 28.26² =
  29. 29.11² =
  30. 30.25² =
  31. 31.26² =
  32. 32.16² =
  33. 33.14² =
  34. 34.25² =
  35. 35.21² =
  36. 36.22² =
  37. 37.15² =
  38. 38.28² =
  39. 39.27² =
  40. 40.16² =

Answer key

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

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