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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 480 · 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. 1.13² =
  2. 2.16² =
  3. 3.18² =
  4. 4.23² =
  5. 5.17² =
  6. 6.15² =
  7. 7.19² =
  8. 8.28² =
  9. 9.12² =
  10. 10.22² =
  11. 11.21² =
  12. 12.24² =
  13. 13.11² =
  14. 14.26² =
  15. 15.29² =
  16. 16.27² =
  17. 17.14² =
  18. 18.18² =
  19. 19.25² =
  20. 20.18² =
  21. 21.25² =
  22. 22.17² =
  23. 23.22² =
  24. 24.24² =
  25. 25.24² =
  26. 26.21² =
  27. 27.26² =
  28. 28.16² =
  29. 29.28² =
  30. 30.17² =
  31. 31.27² =
  32. 32.15² =
  33. 33.12² =
  34. 34.18² =
  35. 35.24² =
  36. 36.15² =
  37. 37.18² =
  38. 38.14² =
  39. 39.16² =
  40. 40.18² =

Answer key

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

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