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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 720 · 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. 1.24² =
  2. 2.15² =
  3. 3.17² =
  4. 4.22² =
  5. 5.29² =
  6. 6.14² =
  7. 7.19² =
  8. 8.13² =
  9. 9.16² =
  10. 10.28² =
  11. 11.23² =
  12. 12.26² =
  13. 13.25² =
  14. 14.27² =
  15. 15.21² =
  16. 16.23² =
  17. 17.27² =
  18. 18.18² =
  19. 19.12² =
  20. 20.27² =
  21. 21.11² =
  22. 22.27² =
  23. 23.18² =
  24. 24.29² =
  25. 25.16² =
  26. 26.19² =
  27. 27.28² =
  28. 28.11² =
  29. 29.14² =
  30. 30.21² =
  31. 31.25² =
  32. 32.14² =
  33. 33.25² =
  34. 34.15² =
  35. 35.11² =
  36. 36.13² =
  37. 37.27² =
  38. 38.23² =
  39. 39.18² =
  40. 40.22² =

Answer key

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

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