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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 851 · 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. 3.18² =
  4. 4.15² =
  5. 5.11² =
  6. 6.26² =
  7. 7.28² =
  8. 8.23² =
  9. 9.13² =
  10. 10.16² =
  11. 11.22² =
  12. 12.24² =
  13. 13.12² =
  14. 14.25² =
  15. 15.21² =
  16. 16.29² =
  17. 17.14² =
  18. 18.21² =
  19. 19.15² =
  20. 20.13² =
  21. 21.28² =
  22. 22.25² =
  23. 23.27² =
  24. 24.22² =
  25. 25.19² =
  26. 26.15² =
  27. 27.17² =
  28. 28.11² =
  29. 29.29² =
  30. 30.15² =
  31. 31.29² =
  32. 32.13² =
  33. 33.19² =
  34. 34.19² =
  35. 35.23² =
  36. 36.23² =
  37. 37.23² =
  38. 38.29² =
  39. 39.15² =
  40. 40.11² =

Answer key

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

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