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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 246 · 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. 1.16² =
  2. 2.14² =
  3. 3.21² =
  4. 4.26² =
  5. 5.19² =
  6. 6.25² =
  7. 7.24² =
  8. 8.28² =
  9. 9.11² =
  10. 10.27² =
  11. 11.22² =
  12. 12.15² =
  13. 13.13² =
  14. 14.29² =
  15. 15.17² =
  16. 16.12² =
  17. 17.15² =
  18. 18.18² =
  19. 19.23² =
  20. 20.29² =
  21. 21.16² =
  22. 22.26² =
  23. 23.23² =
  24. 24.11² =
  25. 25.29² =
  26. 26.15² =
  27. 27.24² =
  28. 28.12² =
  29. 29.18² =
  30. 30.29² =
  31. 31.22² =
  32. 32.18² =
  33. 33.11² =
  34. 34.25² =
  35. 35.26² =
  36. 36.21² =
  37. 37.27² =
  38. 38.29² =
  39. 39.26² =
  40. 40.27² =

Answer key

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

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