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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 219 · 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. 2.23² =
  3. 3.12² =
  4. 4.17² =
  5. 5.25² =
  6. 6.21² =
  7. 7.19² =
  8. 8.24² =
  9. 9.11² =
  10. 10.26² =
  11. 11.22² =
  12. 12.13² =
  13. 13.16² =
  14. 14.18² =
  15. 15.14² =
  16. 16.18² =
  17. 17.29² =
  18. 18.15² =
  19. 19.25² =
  20. 20.19² =
  21. 21.28² =
  22. 22.27² =
  23. 23.11² =
  24. 24.15² =
  25. 25.16² =
  26. 26.11² =
  27. 27.16² =
  28. 28.29² =
  29. 29.21² =
  30. 30.27² =
  31. 31.12² =
  32. 32.28² =
  33. 33.11² =
  34. 34.22² =
  35. 35.12² =
  36. 36.21² =
  37. 37.21² =
  38. 38.16² =
  39. 39.29² =
  40. 40.14² =

Answer key

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

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