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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 736 · 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. 2.12² =
  3. 3.18² =
  4. 4.16² =
  5. 5.24² =
  6. 6.11² =
  7. 7.21² =
  8. 8.22² =
  9. 9.28² =
  10. 10.17² =
  11. 11.14² =
  12. 12.25² =
  13. 13.13² =
  14. 14.29² =
  15. 15.19² =
  16. 16.27² =
  17. 17.15² =
  18. 18.18² =
  19. 19.25² =
  20. 20.26² =
  21. 21.19² =
  22. 22.11² =
  23. 23.18² =
  24. 24.12² =
  25. 25.16² =
  26. 26.22² =
  27. 27.17² =
  28. 28.14² =
  29. 29.23² =
  30. 30.17² =
  31. 31.23² =
  32. 32.18² =
  33. 33.27² =
  34. 34.12² =
  35. 35.11² =
  36. 36.27² =
  37. 37.19² =
  38. 38.26² =
  39. 39.13² =
  40. 40.28² =

Answer key

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

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