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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 498 · 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. 1.18² =
  2. 2.22² =
  3. 3.26² =
  4. 4.19² =
  5. 5.23² =
  6. 6.29² =
  7. 7.13² =
  8. 8.21² =
  9. 9.14² =
  10. 10.17² =
  11. 11.28² =
  12. 12.16² =
  13. 13.24² =
  14. 14.27² =
  15. 15.14² =
  16. 16.11² =
  17. 17.15² =
  18. 18.25² =
  19. 19.12² =
  20. 20.21² =
  21. 21.14² =
  22. 22.11² =
  23. 23.27² =
  24. 24.29² =
  25. 25.17² =
  26. 26.17² =
  27. 27.16² =
  28. 28.22² =
  29. 29.25² =
  30. 30.16² =
  31. 31.21² =
  32. 32.14² =
  33. 33.28² =
  34. 34.26² =
  35. 35.18² =
  36. 36.18² =
  37. 37.13² =
  38. 38.27² =
  39. 39.26² =
  40. 40.19² =

Answer key

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

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