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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 753 · 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. 2.13² =
  3. 3.14² =
  4. 4.12² =
  5. 5.29² =
  6. 6.21² =
  7. 7.16² =
  8. 8.25² =
  9. 9.26² =
  10. 10.22² =
  11. 11.19² =
  12. 12.11² =
  13. 13.17² =
  14. 14.15² =
  15. 15.27² =
  16. 16.23² =
  17. 17.15² =
  18. 18.27² =
  19. 19.16² =
  20. 20.21² =
  21. 21.18² =
  22. 22.24² =
  23. 23.15² =
  24. 24.29² =
  25. 25.12² =
  26. 26.11² =
  27. 27.15² =
  28. 28.17² =
  29. 29.25² =
  30. 30.12² =
  31. 31.18² =
  32. 32.16² =
  33. 33.17² =
  34. 34.19² =
  35. 35.26² =
  36. 36.11² =
  37. 37.26² =
  38. 38.15² =
  39. 39.29² =
  40. 40.11² =

Answer key

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

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