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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 546 · 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. 1.29² =
  2. 2.19² =
  3. 3.13² =
  4. 4.25² =
  5. 5.27² =
  6. 6.26² =
  7. 7.16² =
  8. 8.17² =
  9. 9.21² =
  10. 10.23² =
  11. 11.22² =
  12. 12.24² =
  13. 13.15² =
  14. 14.14² =
  15. 15.12² =
  16. 16.25² =
  17. 17.11² =
  18. 18.28² =
  19. 19.11² =
  20. 20.22² =
  21. 21.18² =
  22. 22.25² =
  23. 23.14² =
  24. 24.22² =
  25. 25.18² =
  26. 26.11² =
  27. 27.22² =
  28. 28.28² =
  29. 29.23² =
  30. 30.27² =
  31. 31.18² =
  32. 32.23² =
  33. 33.29² =
  34. 34.16² =
  35. 35.17² =
  36. 36.21² =
  37. 37.29² =
  38. 38.11² =
  39. 39.25² =
  40. 40.29² =

Answer key

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

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