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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 114 · 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. 1.21² =
  2. 2.14² =
  3. 3.17² =
  4. 4.29² =
  5. 5.27² =
  6. 6.13² =
  7. 7.12² =
  8. 8.16² =
  9. 9.28² =
  10. 10.15² =
  11. 11.18² =
  12. 12.25² =
  13. 13.22² =
  14. 14.26² =
  15. 15.11² =
  16. 16.19² =
  17. 17.24² =
  18. 18.24² =
  19. 19.26² =
  20. 20.12² =
  21. 21.23² =
  22. 22.25² =
  23. 23.14² =
  24. 24.18² =
  25. 25.26² =
  26. 26.23² =
  27. 27.29² =
  28. 28.18² =
  29. 29.14² =
  30. 30.12² =
  31. 31.13² =
  32. 32.28² =
  33. 33.27² =
  34. 34.23² =
  35. 35.27² =
  36. 36.14² =
  37. 37.18² =
  38. 38.26² =
  39. 39.15² =
  40. 40.16² =

Answer key

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

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