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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 91 · 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. 1.28² =
  2. 2.26² =
  3. 3.29² =
  4. 4.18² =
  5. 5.21² =
  6. 6.27² =
  7. 7.16² =
  8. 8.12² =
  9. 9.25² =
  10. 10.23² =
  11. 11.24² =
  12. 12.22² =
  13. 13.14² =
  14. 14.16² =
  15. 15.11² =
  16. 16.15² =
  17. 17.19² =
  18. 18.22² =
  19. 19.17² =
  20. 20.13² =
  21. 21.15² =
  22. 22.23² =
  23. 23.26² =
  24. 24.21² =
  25. 25.21² =
  26. 26.25² =
  27. 27.18² =
  28. 28.23² =
  29. 29.14² =
  30. 30.23² =
  31. 31.11² =
  32. 32.29² =
  33. 33.24² =
  34. 34.19² =
  35. 35.16² =
  36. 36.11² =
  37. 37.11² =
  38. 38.26² =
  39. 39.29² =
  40. 40.12² =

Answer key

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

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