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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 693 · 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. 1.11² =
  2. 2.18² =
  3. 3.24² =
  4. 4.23² =
  5. 5.15² =
  6. 6.13² =
  7. 7.17² =
  8. 8.16² =
  9. 9.14² =
  10. 10.27² =
  11. 11.26² =
  12. 12.12² =
  13. 13.28² =
  14. 14.29² =
  15. 15.22² =
  16. 16.19² =
  17. 17.21² =
  18. 18.21² =
  19. 19.21² =
  20. 20.17² =
  21. 21.25² =
  22. 22.26² =
  23. 23.22² =
  24. 24.26² =
  25. 25.22² =
  26. 26.29² =
  27. 27.17² =
  28. 28.27² =
  29. 29.16² =
  30. 30.14² =
  31. 31.27² =
  32. 32.17² =
  33. 33.12² =
  34. 34.29² =
  35. 35.16² =
  36. 36.26² =
  37. 37.11² =
  38. 38.21² =
  39. 39.13² =
  40. 40.27² =

Answer key

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

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