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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 278 · 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. 1.21² =
  2. 2.17² =
  3. 3.18² =
  4. 4.19² =
  5. 5.12² =
  6. 6.23² =
  7. 7.16² =
  8. 8.26² =
  9. 9.25² =
  10. 10.24² =
  11. 11.15² =
  12. 12.22² =
  13. 13.11² =
  14. 14.13² =
  15. 15.11² =
  16. 16.27² =
  17. 17.28² =
  18. 18.25² =
  19. 19.14² =
  20. 20.29² =
  21. 21.15² =
  22. 22.21² =
  23. 23.19² =
  24. 24.25² =
  25. 25.25² =
  26. 26.16² =
  27. 27.19² =
  28. 28.12² =
  29. 29.16² =
  30. 30.21² =
  31. 31.16² =
  32. 32.22² =
  33. 33.17² =
  34. 34.28² =
  35. 35.26² =
  36. 36.25² =
  37. 37.17² =
  38. 38.16² =
  39. 39.24² =
  40. 40.16² =

Answer key

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

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