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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 472 · 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. 1.19² =
  2. 2.29² =
  3. 3.21² =
  4. 4.17² =
  5. 5.26² =
  6. 6.11² =
  7. 7.12² =
  8. 8.18² =
  9. 9.23² =
  10. 10.24² =
  11. 11.13² =
  12. 12.27² =
  13. 13.15² =
  14. 14.22² =
  15. 15.25² =
  16. 16.14² =
  17. 17.16² =
  18. 18.28² =
  19. 19.17² =
  20. 20.15² =
  21. 21.29² =
  22. 22.11² =
  23. 23.27² =
  24. 24.13² =
  25. 25.25² =
  26. 26.16² =
  27. 27.21² =
  28. 28.14² =
  29. 29.19² =
  30. 30.23² =
  31. 31.11² =
  32. 32.16² =
  33. 33.22² =
  34. 34.26² =
  35. 35.24² =
  36. 36.13² =
  37. 37.28² =
  38. 38.27² =
  39. 39.22² =
  40. 40.23² =

Answer key

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

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