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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 312 · 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. 1.26² =
  2. 2.21² =
  3. 3.19² =
  4. 4.16² =
  5. 5.22² =
  6. 6.14² =
  7. 7.13² =
  8. 8.25² =
  9. 9.24² =
  10. 10.18² =
  11. 11.15² =
  12. 12.17² =
  13. 13.11² =
  14. 14.12² =
  15. 15.23² =
  16. 16.25² =
  17. 17.28² =
  18. 18.11² =
  19. 19.29² =
  20. 20.27² =
  21. 21.28² =
  22. 22.11² =
  23. 23.19² =
  24. 24.14² =
  25. 25.14² =
  26. 26.16² =
  27. 27.24² =
  28. 28.16² =
  29. 29.11² =
  30. 30.19² =
  31. 31.27² =
  32. 32.18² =
  33. 33.12² =
  34. 34.14² =
  35. 35.28² =
  36. 36.16² =
  37. 37.18² =
  38. 38.17² =
  39. 39.19² =
  40. 40.22² =

Answer key

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

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