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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 592 · 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. 1.19² =
  2. 2.13² =
  3. 3.24² =
  4. 4.28² =
  5. 5.18² =
  6. 6.22² =
  7. 7.17² =
  8. 8.14² =
  9. 9.23² =
  10. 10.21² =
  11. 11.12² =
  12. 12.16² =
  13. 13.11² =
  14. 14.27² =
  15. 15.25² =
  16. 16.15² =
  17. 17.29² =
  18. 18.25² =
  19. 19.26² =
  20. 20.11² =
  21. 21.14² =
  22. 22.25² =
  23. 23.19² =
  24. 24.13² =
  25. 25.11² =
  26. 26.27² =
  27. 27.21² =
  28. 28.21² =
  29. 29.28² =
  30. 30.19² =
  31. 31.18² =
  32. 32.15² =
  33. 33.27² =
  34. 34.19² =
  35. 35.18² =
  36. 36.13² =
  37. 37.15² =
  38. 38.23² =
  39. 39.29² =
  40. 40.26² =

Answer key

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

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