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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 831 · 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. 1.29² =
  2. 2.18² =
  3. 3.26² =
  4. 4.16² =
  5. 5.24² =
  6. 6.21² =
  7. 7.14² =
  8. 8.15² =
  9. 9.12² =
  10. 10.19² =
  11. 11.27² =
  12. 12.13² =
  13. 13.11² =
  14. 14.25² =
  15. 15.23² =
  16. 16.28² =
  17. 17.17² =
  18. 18.21² =
  19. 19.16² =
  20. 20.12² =
  21. 21.22² =
  22. 22.21² =
  23. 23.25² =
  24. 24.13² =
  25. 25.12² =
  26. 26.26² =
  27. 27.24² =
  28. 28.14² =
  29. 29.26² =
  30. 30.19² =
  31. 31.15² =
  32. 32.17² =
  33. 33.14² =
  34. 34.12² =
  35. 35.28² =
  36. 36.14² =
  37. 37.23² =
  38. 38.26² =
  39. 39.24² =
  40. 40.12² =

Answer key

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

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