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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 257 · 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. 1.25² =
  2. 2.26² =
  3. 3.16² =
  4. 4.14² =
  5. 5.19² =
  6. 6.27² =
  7. 7.29² =
  8. 8.18² =
  9. 9.11² =
  10. 10.17² =
  11. 11.13² =
  12. 12.12² =
  13. 13.28² =
  14. 14.15² =
  15. 15.21² =
  16. 16.15² =
  17. 17.22² =
  18. 18.24² =
  19. 19.23² =
  20. 20.14² =
  21. 21.13² =
  22. 22.21² =
  23. 23.25² =
  24. 24.27² =
  25. 25.14² =
  26. 26.12² =
  27. 27.12² =
  28. 28.19² =
  29. 29.16² =
  30. 30.16² =
  31. 31.15² =
  32. 32.18² =
  33. 33.13² =
  34. 34.11² =
  35. 35.24² =
  36. 36.11² =
  37. 37.29² =
  38. 38.21² =
  39. 39.15² =
  40. 40.14² =

Answer key

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

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