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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 474 · 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. 1.19² =
  2. 2.24² =
  3. 3.29² =
  4. 4.15² =
  5. 5.11² =
  6. 6.16² =
  7. 7.12² =
  8. 8.18² =
  9. 9.21² =
  10. 10.27² =
  11. 11.28² =
  12. 12.14² =
  13. 13.13² =
  14. 14.23² =
  15. 15.25² =
  16. 16.17² =
  17. 17.26² =
  18. 18.21² =
  19. 19.22² =
  20. 20.19² =
  21. 21.14² =
  22. 22.19² =
  23. 23.16² =
  24. 24.15² =
  25. 25.22² =
  26. 26.18² =
  27. 27.14² =
  28. 28.18² =
  29. 29.21² =
  30. 30.17² =
  31. 31.16² =
  32. 32.26² =
  33. 33.22² =
  34. 34.24² =
  35. 35.27² =
  36. 36.27² =
  37. 37.18² =
  38. 38.13² =
  39. 39.25² =
  40. 40.28² =

Answer key

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

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