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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 492 · 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. 2.12² =
  3. 3.13² =
  4. 4.17² =
  5. 5.29² =
  6. 6.18² =
  7. 7.26² =
  8. 8.19² =
  9. 9.11² =
  10. 10.16² =
  11. 11.15² =
  12. 12.23² =
  13. 13.21² =
  14. 14.22² =
  15. 15.25² =
  16. 16.14² =
  17. 17.27² =
  18. 18.24² =
  19. 19.11² =
  20. 20.21² =
  21. 21.25² =
  22. 22.21² =
  23. 23.29² =
  24. 24.13² =
  25. 25.14² =
  26. 26.18² =
  27. 27.19² =
  28. 28.21² =
  29. 29.25² =
  30. 30.12² =
  31. 31.13² =
  32. 32.27² =
  33. 33.25² =
  34. 34.22² =
  35. 35.15² =
  36. 36.19² =
  37. 37.18² =
  38. 38.21² =
  39. 39.16² =
  40. 40.13² =

Answer key

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

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