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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 20 · 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. 1.25² =
  2. 2.12² =
  3. 3.11² =
  4. 4.27² =
  5. 5.26² =
  6. 6.15² =
  7. 7.28² =
  8. 8.22² =
  9. 9.18² =
  10. 10.21² =
  11. 11.14² =
  12. 12.24² =
  13. 13.16² =
  14. 14.23² =
  15. 15.29² =
  16. 16.17² =
  17. 17.13² =
  18. 18.24² =
  19. 19.19² =
  20. 20.11² =
  21. 21.13² =
  22. 22.27² =
  23. 23.16² =
  24. 24.11² =
  25. 25.24² =
  26. 26.21² =
  27. 27.17² =
  28. 28.21² =
  29. 29.11² =
  30. 30.29² =
  31. 31.27² =
  32. 32.19² =
  33. 33.22² =
  34. 34.23² =
  35. 35.11² =
  36. 36.21² =
  37. 37.25² =
  38. 38.28² =
  39. 39.26² =
  40. 40.18² =

Answer key

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

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