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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 680 · 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. 1.12² =
  2. 2.23² =
  3. 3.13² =
  4. 4.14² =
  5. 5.18² =
  6. 6.19² =
  7. 7.26² =
  8. 8.15² =
  9. 9.22² =
  10. 10.25² =
  11. 11.16² =
  12. 12.24² =
  13. 13.27² =
  14. 14.11² =
  15. 15.21² =
  16. 16.29² =
  17. 17.17² =
  18. 18.22² =
  19. 19.28² =
  20. 20.15² =
  21. 21.27² =
  22. 22.29² =
  23. 23.12² =
  24. 24.19² =
  25. 25.27² =
  26. 26.27² =
  27. 27.14² =
  28. 28.27² =
  29. 29.17² =
  30. 30.12² =
  31. 31.16² =
  32. 32.21² =
  33. 33.27² =
  34. 34.22² =
  35. 35.18² =
  36. 36.21² =
  37. 37.18² =
  38. 38.12² =
  39. 39.15² =
  40. 40.25² =

Answer key

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

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