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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 750 · 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. 2.21² =
  3. 3.14² =
  4. 4.15² =
  5. 5.18² =
  6. 6.25² =
  7. 7.27² =
  8. 8.12² =
  9. 9.16² =
  10. 10.13² =
  11. 11.29² =
  12. 12.17² =
  13. 13.26² =
  14. 14.11² =
  15. 15.28² =
  16. 16.22² =
  17. 17.23² =
  18. 18.18² =
  19. 19.25² =
  20. 20.24² =
  21. 21.23² =
  22. 22.21² =
  23. 23.21² =
  24. 24.16² =
  25. 25.25² =
  26. 26.16² =
  27. 27.16² =
  28. 28.24² =
  29. 29.21² =
  30. 30.25² =
  31. 31.11² =
  32. 32.17² =
  33. 33.14² =
  34. 34.13² =
  35. 35.22² =
  36. 36.17² =
  37. 37.24² =
  38. 38.19² =
  39. 39.23² =
  40. 40.21² =

Answer key

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

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