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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 500 · 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. 1.24² =
  2. 2.11² =
  3. 3.17² =
  4. 4.18² =
  5. 5.28² =
  6. 6.21² =
  7. 7.25² =
  8. 8.15² =
  9. 9.13² =
  10. 10.14² =
  11. 11.29² =
  12. 12.27² =
  13. 13.26² =
  14. 14.16² =
  15. 15.19² =
  16. 16.22² =
  17. 17.12² =
  18. 18.27² =
  19. 19.27² =
  20. 20.23² =
  21. 21.11² =
  22. 22.14² =
  23. 23.11² =
  24. 24.21² =
  25. 25.14² =
  26. 26.26² =
  27. 27.11² =
  28. 28.16² =
  29. 29.13² =
  30. 30.29² =
  31. 31.21² =
  32. 32.21² =
  33. 33.21² =
  34. 34.11² =
  35. 35.12² =
  36. 36.22² =
  37. 37.21² =
  38. 38.11² =
  39. 39.13² =
  40. 40.12² =

Answer key

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

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