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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 141 · 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. 1.22² =
  2. 2.19² =
  3. 3.12² =
  4. 4.11² =
  5. 5.15² =
  6. 6.27² =
  7. 7.16² =
  8. 8.25² =
  9. 9.23² =
  10. 10.17² =
  11. 11.21² =
  12. 12.24² =
  13. 13.29² =
  14. 14.28² =
  15. 15.14² =
  16. 16.18² =
  17. 17.19² =
  18. 18.22² =
  19. 19.26² =
  20. 20.16² =
  21. 21.13² =
  22. 22.22² =
  23. 23.13² =
  24. 24.16² =
  25. 25.11² =
  26. 26.25² =
  27. 27.12² =
  28. 28.29² =
  29. 29.18² =
  30. 30.14² =
  31. 31.21² =
  32. 32.27² =
  33. 33.29² =
  34. 34.17² =
  35. 35.18² =
  36. 36.21² =
  37. 37.24² =
  38. 38.21² =
  39. 39.22² =
  40. 40.15² =

Answer key

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

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