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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 205 · 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. 1.14² =
  2. 2.22² =
  3. 3.21² =
  4. 4.17² =
  5. 5.19² =
  6. 6.12² =
  7. 7.13² =
  8. 8.11² =
  9. 9.15² =
  10. 10.16² =
  11. 11.29² =
  12. 12.25² =
  13. 13.18² =
  14. 14.23² =
  15. 15.26² =
  16. 16.24² =
  17. 17.27² =
  18. 18.28² =
  19. 19.21² =
  20. 20.16² =
  21. 21.15² =
  22. 22.13² =
  23. 23.22² =
  24. 24.25² =
  25. 25.13² =
  26. 26.23² =
  27. 27.27² =
  28. 28.26² =
  29. 29.29² =
  30. 30.12² =
  31. 31.29² =
  32. 32.21² =
  33. 33.14² =
  34. 34.11² =
  35. 35.25² =
  36. 36.22² =
  37. 37.25² =
  38. 38.27² =
  39. 39.29² =
  40. 40.11² =

Answer key

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

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