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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 565 · 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. 1.23² =
  2. 2.19² =
  3. 3.15² =
  4. 4.21² =
  5. 5.17² =
  6. 6.25² =
  7. 7.26² =
  8. 8.14² =
  9. 9.22² =
  10. 10.16² =
  11. 11.29² =
  12. 12.11² =
  13. 13.12² =
  14. 14.18² =
  15. 15.24² =
  16. 16.27² =
  17. 17.14² =
  18. 18.28² =
  19. 19.14² =
  20. 20.13² =
  21. 21.13² =
  22. 22.21² =
  23. 23.26² =
  24. 24.26² =
  25. 25.24² =
  26. 26.16² =
  27. 27.21² =
  28. 28.29² =
  29. 29.17² =
  30. 30.22² =
  31. 31.21² =
  32. 32.24² =
  33. 33.18² =
  34. 34.27² =
  35. 35.27² =
  36. 36.26² =
  37. 37.11² =
  38. 38.28² =
  39. 39.13² =
  40. 40.11² =

Answer key

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

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