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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 346 · 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. 2.26² =
  3. 3.23² =
  4. 4.22² =
  5. 5.14² =
  6. 6.21² =
  7. 7.24² =
  8. 8.16² =
  9. 9.29² =
  10. 10.28² =
  11. 11.15² =
  12. 12.25² =
  13. 13.12² =
  14. 14.17² =
  15. 15.13² =
  16. 16.18² =
  17. 17.29² =
  18. 18.27² =
  19. 19.19² =
  20. 20.15² =
  21. 21.22² =
  22. 22.22² =
  23. 23.16² =
  24. 24.14² =
  25. 25.12² =
  26. 26.11² =
  27. 27.11² =
  28. 28.11² =
  29. 29.23² =
  30. 30.18² =
  31. 31.23² =
  32. 32.12² =
  33. 33.16² =
  34. 34.18² =
  35. 35.28² =
  36. 36.15² =
  37. 37.18² =
  38. 38.18² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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