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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 73 · 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. 1.16² =
  2. 2.12² =
  3. 3.11² =
  4. 4.27² =
  5. 5.22² =
  6. 6.28² =
  7. 7.29² =
  8. 8.23² =
  9. 9.24² =
  10. 10.25² =
  11. 11.13² =
  12. 12.19² =
  13. 13.18² =
  14. 14.21² =
  15. 15.26² =
  16. 16.14² =
  17. 17.15² =
  18. 18.17² =
  19. 19.16² =
  20. 20.11² =
  21. 21.14² =
  22. 22.13² =
  23. 23.15² =
  24. 24.23² =
  25. 25.18² =
  26. 26.29² =
  27. 27.27² =
  28. 28.21² =
  29. 29.11² =
  30. 30.11² =
  31. 31.26² =
  32. 32.11² =
  33. 33.27² =
  34. 34.21² =
  35. 35.16² =
  36. 36.28² =
  37. 37.13² =
  38. 38.19² =
  39. 39.24² =
  40. 40.11² =

Answer key

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

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