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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 535 · 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. 1.27² =
  2. 2.14² =
  3. 3.24² =
  4. 4.26² =
  5. 5.21² =
  6. 6.25² =
  7. 7.15² =
  8. 8.28² =
  9. 9.22² =
  10. 10.29² =
  11. 11.23² =
  12. 12.11² =
  13. 13.17² =
  14. 14.13² =
  15. 15.12² =
  16. 16.18² =
  17. 17.19² =
  18. 18.16² =
  19. 19.12² =
  20. 20.14² =
  21. 21.13² =
  22. 22.27² =
  23. 23.22² =
  24. 24.23² =
  25. 25.16² =
  26. 26.13² =
  27. 27.25² =
  28. 28.14² =
  29. 29.25² =
  30. 30.21² =
  31. 31.19² =
  32. 32.11² =
  33. 33.21² =
  34. 34.26² =
  35. 35.16² =
  36. 36.17² =
  37. 37.25² =
  38. 38.11² =
  39. 39.17² =
  40. 40.11² =

Answer key

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

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