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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 116 · 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. 1.23² =
  2. 2.18² =
  3. 3.16² =
  4. 4.17² =
  5. 5.25² =
  6. 6.19² =
  7. 7.11² =
  8. 8.21² =
  9. 9.14² =
  10. 10.12² =
  11. 11.15² =
  12. 12.22² =
  13. 13.29² =
  14. 14.13² =
  15. 15.24² =
  16. 16.27² =
  17. 17.28² =
  18. 18.26² =
  19. 19.14² =
  20. 20.27² =
  21. 21.18² =
  22. 22.15² =
  23. 23.12² =
  24. 24.16² =
  25. 25.25² =
  26. 26.27² =
  27. 27.22² =
  28. 28.16² =
  29. 29.13² =
  30. 30.15² =
  31. 31.17² =
  32. 32.12² =
  33. 33.18² =
  34. 34.16² =
  35. 35.27² =
  36. 36.21² =
  37. 37.14² =
  38. 38.18² =
  39. 39.21² =
  40. 40.27² =

Answer key

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

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