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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 678 · 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. 2.17² =
  3. 3.27² =
  4. 4.21² =
  5. 5.29² =
  6. 6.15² =
  7. 7.11² =
  8. 8.23² =
  9. 9.18² =
  10. 10.25² =
  11. 11.13² =
  12. 12.22² =
  13. 13.14² =
  14. 14.19² =
  15. 15.28² =
  16. 16.29² =
  17. 17.24² =
  18. 18.12² =
  19. 19.17² =
  20. 20.26² =
  21. 21.24² =
  22. 22.25² =
  23. 23.28² =
  24. 24.14² =
  25. 25.14² =
  26. 26.16² =
  27. 27.13² =
  28. 28.11² =
  29. 29.11² =
  30. 30.21² =
  31. 31.13² =
  32. 32.11² =
  33. 33.29² =
  34. 34.23² =
  35. 35.11² =
  36. 36.12² =
  37. 37.24² =
  38. 38.22² =
  39. 39.24² =
  40. 40.16² =

Answer key

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

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