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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 852 · 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. 1.28² =
  2. 2.19² =
  3. 3.15² =
  4. 4.27² =
  5. 5.13² =
  6. 6.25² =
  7. 7.22² =
  8. 8.26² =
  9. 9.14² =
  10. 10.23² =
  11. 11.17² =
  12. 12.16² =
  13. 13.11² =
  14. 14.12² =
  15. 15.21² =
  16. 16.24² =
  17. 17.21² =
  18. 18.29² =
  19. 19.18² =
  20. 20.16² =
  21. 21.11² =
  22. 22.13² =
  23. 23.29² =
  24. 24.25² =
  25. 25.13² =
  26. 26.23² =
  27. 27.25² =
  28. 28.14² =
  29. 29.25² =
  30. 30.25² =
  31. 31.27² =
  32. 32.21² =
  33. 33.12² =
  34. 34.28² =
  35. 35.18² =
  36. 36.26² =
  37. 37.26² =
  38. 38.11² =
  39. 39.16² =
  40. 40.22² =

Answer key

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

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