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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 562 · 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. 1.26² =
  2. 2.29² =
  3. 3.21² =
  4. 4.23² =
  5. 5.27² =
  6. 6.13² =
  7. 7.25² =
  8. 8.17² =
  9. 9.28² =
  10. 10.15² =
  11. 11.14² =
  12. 12.22² =
  13. 13.11² =
  14. 14.18² =
  15. 15.24² =
  16. 16.16² =
  17. 17.19² =
  18. 18.12² =
  19. 19.24² =
  20. 20.29² =
  21. 21.21² =
  22. 22.15² =
  23. 23.11² =
  24. 24.13² =
  25. 25.21² =
  26. 26.18² =
  27. 27.13² =
  28. 28.28² =
  29. 29.14² =
  30. 30.14² =
  31. 31.12² =
  32. 32.16² =
  33. 33.16² =
  34. 34.14² =
  35. 35.12² =
  36. 36.16² =
  37. 37.18² =
  38. 38.16² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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