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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 426 · 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. 1.17² =
  2. 2.12² =
  3. 3.14² =
  4. 4.28² =
  5. 5.21² =
  6. 6.13² =
  7. 7.15² =
  8. 8.29² =
  9. 9.22² =
  10. 10.27² =
  11. 11.24² =
  12. 12.16² =
  13. 13.26² =
  14. 14.23² =
  15. 15.19² =
  16. 16.11² =
  17. 17.18² =
  18. 18.11² =
  19. 19.23² =
  20. 20.25² =
  21. 21.26² =
  22. 22.15² =
  23. 23.23² =
  24. 24.18² =
  25. 25.19² =
  26. 26.16² =
  27. 27.11² =
  28. 28.14² =
  29. 29.13² =
  30. 30.26² =
  31. 31.19² =
  32. 32.11² =
  33. 33.26² =
  34. 34.19² =
  35. 35.17² =
  36. 36.16² =
  37. 37.23² =
  38. 38.24² =
  39. 39.17² =
  40. 40.11² =

Answer key

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

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