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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 209 · 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. 1.29² =
  2. 2.24² =
  3. 3.21² =
  4. 4.22² =
  5. 5.23² =
  6. 6.26² =
  7. 7.11² =
  8. 8.16² =
  9. 9.19² =
  10. 10.14² =
  11. 11.27² =
  12. 12.28² =
  13. 13.12² =
  14. 14.17² =
  15. 15.15² =
  16. 16.25² =
  17. 17.13² =
  18. 18.18² =
  19. 19.19² =
  20. 20.11² =
  21. 21.25² =
  22. 22.25² =
  23. 23.18² =
  24. 24.23² =
  25. 25.11² =
  26. 26.13² =
  27. 27.26² =
  28. 28.26² =
  29. 29.14² =
  30. 30.15² =
  31. 31.11² =
  32. 32.11² =
  33. 33.16² =
  34. 34.22² =
  35. 35.27² =
  36. 36.28² =
  37. 37.27² =
  38. 38.24² =
  39. 39.21² =
  40. 40.29² =

Answer key

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

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