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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 341 · 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. 2.16² =
  3. 3.15² =
  4. 4.25² =
  5. 5.23² =
  6. 6.17² =
  7. 7.14² =
  8. 8.11² =
  9. 9.12² =
  10. 10.22² =
  11. 11.26² =
  12. 12.24² =
  13. 13.21² =
  14. 14.18² =
  15. 15.19² =
  16. 16.13² =
  17. 17.27² =
  18. 18.21² =
  19. 19.15² =
  20. 20.29² =
  21. 21.11² =
  22. 22.26² =
  23. 23.22² =
  24. 24.14² =
  25. 25.14² =
  26. 26.24² =
  27. 27.19² =
  28. 28.29² =
  29. 29.17² =
  30. 30.29² =
  31. 31.12² =
  32. 32.12² =
  33. 33.17² =
  34. 34.13² =
  35. 35.14² =
  36. 36.17² =
  37. 37.16² =
  38. 38.21² =
  39. 39.26² =
  40. 40.25² =

Answer key

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

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