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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 490 · 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. 2.13² =
  3. 3.12² =
  4. 4.11² =
  5. 5.27² =
  6. 6.17² =
  7. 7.19² =
  8. 8.15² =
  9. 9.14² =
  10. 10.28² =
  11. 11.23² =
  12. 12.23² =
  13. 13.29² =
  14. 14.18² =
  15. 15.25² =
  16. 16.24² =
  17. 17.26² =
  18. 18.22² =
  19. 19.16² =
  20. 20.15² =
  21. 21.14² =
  22. 22.15² =
  23. 23.18² =
  24. 24.22² =
  25. 25.19² =
  26. 26.25² =
  27. 27.19² =
  28. 28.11² =
  29. 29.25² =
  30. 30.13² =
  31. 31.12² =
  32. 32.16² =
  33. 33.26² =
  34. 34.28² =
  35. 35.24² =
  36. 36.17² =
  37. 37.16² =
  38. 38.21² =
  39. 39.13² =
  40. 40.24² =

Answer key

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

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