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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 17 · 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. 1.15² =
  2. 2.26² =
  3. 3.22² =
  4. 4.16² =
  5. 5.11² =
  6. 6.25² =
  7. 7.12² =
  8. 8.19² =
  9. 9.27² =
  10. 10.13² =
  11. 11.18² =
  12. 12.24² =
  13. 13.17² =
  14. 14.28² =
  15. 15.14² =
  16. 16.21² =
  17. 17.23² =
  18. 18.28² =
  19. 19.16² =
  20. 20.29² =
  21. 21.28² =
  22. 22.27² =
  23. 23.26² =
  24. 24.21² =
  25. 25.21² =
  26. 26.11² =
  27. 27.24² =
  28. 28.17² =
  29. 29.13² =
  30. 30.27² =
  31. 31.18² =
  32. 32.19² =
  33. 33.29² =
  34. 34.24² =
  35. 35.17² =
  36. 36.29² =
  37. 37.22² =
  38. 38.14² =
  39. 39.26² =
  40. 40.29² =

Answer key

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

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