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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 846 · 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. 2.22² =
  3. 3.27² =
  4. 4.26² =
  5. 5.13² =
  6. 6.14² =
  7. 7.29² =
  8. 8.28² =
  9. 9.17² =
  10. 10.15² =
  11. 11.18² =
  12. 12.16² =
  13. 13.25² =
  14. 14.24² =
  15. 15.23² =
  16. 16.12² =
  17. 17.13² =
  18. 18.21² =
  19. 19.12² =
  20. 20.19² =
  21. 21.12² =
  22. 22.19² =
  23. 23.18² =
  24. 24.26² =
  25. 25.29² =
  26. 26.19² =
  27. 27.21² =
  28. 28.27² =
  29. 29.24² =
  30. 30.13² =
  31. 31.17² =
  32. 32.19² =
  33. 33.28² =
  34. 34.28² =
  35. 35.23² =
  36. 36.19² =
  37. 37.29² =
  38. 38.24² =
  39. 39.18² =
  40. 40.17² =

Answer key

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

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