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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 46 · 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. 1.13² =
  2. 2.27² =
  3. 3.22² =
  4. 4.29² =
  5. 5.21² =
  6. 6.18² =
  7. 7.25² =
  8. 8.28² =
  9. 9.24² =
  10. 10.14² =
  11. 11.12² =
  12. 12.23² =
  13. 13.11² =
  14. 14.19² =
  15. 15.15² =
  16. 16.17² =
  17. 17.18² =
  18. 18.26² =
  19. 19.19² =
  20. 20.16² =
  21. 21.18² =
  22. 22.16² =
  23. 23.26² =
  24. 24.27² =
  25. 25.11² =
  26. 26.18² =
  27. 27.28² =
  28. 28.21² =
  29. 29.25² =
  30. 30.19² =
  31. 31.11² =
  32. 32.14² =
  33. 33.17² =
  34. 34.26² =
  35. 35.17² =
  36. 36.27² =
  37. 37.28² =
  38. 38.16² =
  39. 39.17² =
  40. 40.23² =

Answer key

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

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