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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 297 · 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. 1.23² =
  2. 2.27² =
  3. 3.15² =
  4. 4.25² =
  5. 5.12² =
  6. 6.22² =
  7. 7.17² =
  8. 8.24² =
  9. 9.19² =
  10. 10.14² =
  11. 11.11² =
  12. 12.16² =
  13. 13.29² =
  14. 14.18² =
  15. 15.13² =
  16. 16.28² =
  17. 17.14² =
  18. 18.21² =
  19. 19.16² =
  20. 20.14² =
  21. 21.21² =
  22. 22.14² =
  23. 23.25² =
  24. 24.26² =
  25. 25.23² =
  26. 26.25² =
  27. 27.27² =
  28. 28.24² =
  29. 29.12² =
  30. 30.18² =
  31. 31.27² =
  32. 32.26² =
  33. 33.17² =
  34. 34.14² =
  35. 35.17² =
  36. 36.28² =
  37. 37.23² =
  38. 38.12² =
  39. 39.18² =
  40. 40.25² =

Answer key

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

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