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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 300 · 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. 1.16² =
  2. 2.29² =
  3. 3.28² =
  4. 4.14² =
  5. 5.24² =
  6. 6.21² =
  7. 7.22² =
  8. 8.17² =
  9. 9.25² =
  10. 10.26² =
  11. 11.23² =
  12. 12.19² =
  13. 13.11² =
  14. 14.15² =
  15. 15.12² =
  16. 16.29² =
  17. 17.18² =
  18. 18.13² =
  19. 19.23² =
  20. 20.29² =
  21. 21.27² =
  22. 22.23² =
  23. 23.25² =
  24. 24.26² =
  25. 25.22² =
  26. 26.15² =
  27. 27.21² =
  28. 28.13² =
  29. 29.17² =
  30. 30.16² =
  31. 31.14² =
  32. 32.12² =
  33. 33.29² =
  34. 34.16² =
  35. 35.26² =
  36. 36.29² =
  37. 37.21² =
  38. 38.27² =
  39. 39.15² =
  40. 40.12² =

Answer key

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

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