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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 740 · 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. 1.13² =
  2. 2.19² =
  3. 3.28² =
  4. 4.11² =
  5. 5.26² =
  6. 6.17² =
  7. 7.25² =
  8. 8.22² =
  9. 9.24² =
  10. 10.21² =
  11. 11.14² =
  12. 12.29² =
  13. 13.12² =
  14. 14.15² =
  15. 15.27² =
  16. 16.16² =
  17. 17.23² =
  18. 18.21² =
  19. 19.18² =
  20. 20.16² =
  21. 21.19² =
  22. 22.18² =
  23. 23.15² =
  24. 24.15² =
  25. 25.24² =
  26. 26.18² =
  27. 27.18² =
  28. 28.17² =
  29. 29.11² =
  30. 30.14² =
  31. 31.22² =
  32. 32.25² =
  33. 33.18² =
  34. 34.23² =
  35. 35.21² =
  36. 36.14² =
  37. 37.18² =
  38. 38.18² =
  39. 39.17² =
  40. 40.29² =

Answer key

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

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