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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 157 · 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. 1.19² =
  2. 2.29² =
  3. 3.25² =
  4. 4.15² =
  5. 5.24² =
  6. 6.14² =
  7. 7.28² =
  8. 8.26² =
  9. 9.27² =
  10. 10.18² =
  11. 11.11² =
  12. 12.12² =
  13. 13.21² =
  14. 14.16² =
  15. 15.17² =
  16. 16.13² =
  17. 17.14² =
  18. 18.11² =
  19. 19.22² =
  20. 20.23² =
  21. 21.17² =
  22. 22.18² =
  23. 23.21² =
  24. 24.18² =
  25. 25.17² =
  26. 26.21² =
  27. 27.11² =
  28. 28.19² =
  29. 29.16² =
  30. 30.16² =
  31. 31.13² =
  32. 32.29² =
  33. 33.26² =
  34. 34.25² =
  35. 35.15² =
  36. 36.23² =
  37. 37.25² =
  38. 38.24² =
  39. 39.29² =
  40. 40.15² =

Answer key

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

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