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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 614 · 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. 1.17² =
  2. 2.19² =
  3. 3.13² =
  4. 4.15² =
  5. 5.27² =
  6. 6.14² =
  7. 7.16² =
  8. 8.18² =
  9. 9.23² =
  10. 10.24² =
  11. 11.21² =
  12. 12.25² =
  13. 13.28² =
  14. 14.22² =
  15. 15.26² =
  16. 16.11² =
  17. 17.25² =
  18. 18.12² =
  19. 19.14² =
  20. 20.29² =
  21. 21.21² =
  22. 22.25² =
  23. 23.16² =
  24. 24.16² =
  25. 25.17² =
  26. 26.21² =
  27. 27.15² =
  28. 28.17² =
  29. 29.26² =
  30. 30.11² =
  31. 31.26² =
  32. 32.24² =
  33. 33.29² =
  34. 34.24² =
  35. 35.22² =
  36. 36.27² =
  37. 37.22² =
  38. 38.11² =
  39. 39.29² =
  40. 40.22² =

Answer key

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

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