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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 849 · 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. 1.11² =
  2. 2.26² =
  3. 3.18² =
  4. 4.16² =
  5. 5.25² =
  6. 6.29² =
  7. 7.12² =
  8. 8.21² =
  9. 9.22² =
  10. 10.13² =
  11. 11.23² =
  12. 12.28² =
  13. 13.27² =
  14. 14.19² =
  15. 15.17² =
  16. 16.14² =
  17. 17.15² =
  18. 18.24² =
  19. 19.22² =
  20. 20.12² =
  21. 21.13² =
  22. 22.17² =
  23. 23.17² =
  24. 24.26² =
  25. 25.27² =
  26. 26.21² =
  27. 27.27² =
  28. 28.27² =
  29. 29.29² =
  30. 30.19² =
  31. 31.18² =
  32. 32.24² =
  33. 33.15² =
  34. 34.19² =
  35. 35.27² =
  36. 36.13² =
  37. 37.23² =
  38. 38.28² =
  39. 39.15² =
  40. 40.11² =

Answer key

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

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