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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 140 · 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. 1.19² =
  2. 2.11² =
  3. 3.18² =
  4. 4.22² =
  5. 5.21² =
  6. 6.26² =
  7. 7.29² =
  8. 8.24² =
  9. 9.27² =
  10. 10.15² =
  11. 11.25² =
  12. 12.13² =
  13. 13.12² =
  14. 14.28² =
  15. 15.29² =
  16. 16.16² =
  17. 17.17² =
  18. 18.14² =
  19. 19.17² =
  20. 20.11² =
  21. 21.23² =
  22. 22.16² =
  23. 23.21² =
  24. 24.19² =
  25. 25.29² =
  26. 26.16² =
  27. 27.16² =
  28. 28.19² =
  29. 29.14² =
  30. 30.11² =
  31. 31.14² =
  32. 32.14² =
  33. 33.17² =
  34. 34.25² =
  35. 35.14² =
  36. 36.29² =
  37. 37.11² =
  38. 38.16² =
  39. 39.22² =
  40. 40.21² =

Answer key

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

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