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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 616 · 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. 1.17² =
  2. 2.24² =
  3. 3.11² =
  4. 4.26² =
  5. 5.16² =
  6. 6.22² =
  7. 7.28² =
  8. 8.27² =
  9. 9.14² =
  10. 10.13² =
  11. 11.15² =
  12. 12.18² =
  13. 13.19² =
  14. 14.21² =
  15. 15.12² =
  16. 16.23² =
  17. 17.29² =
  18. 18.25² =
  19. 19.11² =
  20. 20.23² =
  21. 21.14² =
  22. 22.15² =
  23. 23.11² =
  24. 24.13² =
  25. 25.25² =
  26. 26.26² =
  27. 27.11² =
  28. 28.27² =
  29. 29.26² =
  30. 30.15² =
  31. 31.22² =
  32. 32.19² =
  33. 33.21² =
  34. 34.29² =
  35. 35.29² =
  36. 36.14² =
  37. 37.21² =
  38. 38.15² =
  39. 39.14² =
  40. 40.27² =

Answer key

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

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