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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 860 · 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. 2.29² =
  3. 3.17² =
  4. 4.24² =
  5. 5.16² =
  6. 6.21² =
  7. 7.11² =
  8. 8.27² =
  9. 9.13² =
  10. 10.15² =
  11. 11.18² =
  12. 12.26² =
  13. 13.14² =
  14. 14.12² =
  15. 15.25² =
  16. 16.23² =
  17. 17.19² =
  18. 18.22² =
  19. 19.21² =
  20. 20.17² =
  21. 21.12² =
  22. 22.15² =
  23. 23.19² =
  24. 24.14² =
  25. 25.27² =
  26. 26.17² =
  27. 27.19² =
  28. 28.14² =
  29. 29.23² =
  30. 30.17² =
  31. 31.13² =
  32. 32.23² =
  33. 33.17² =
  34. 34.28² =
  35. 35.25² =
  36. 36.22² =
  37. 37.14² =
  38. 38.22² =
  39. 39.14² =
  40. 40.18² =

Answer key

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

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