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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 473 · 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. 2.15² =
  3. 3.19² =
  4. 4.24² =
  5. 5.29² =
  6. 6.21² =
  7. 7.25² =
  8. 8.16² =
  9. 9.26² =
  10. 10.14² =
  11. 11.22² =
  12. 12.17² =
  13. 13.11² =
  14. 14.28² =
  15. 15.12² =
  16. 16.13² =
  17. 17.23² =
  18. 18.17² =
  19. 19.18² =
  20. 20.27² =
  21. 21.23² =
  22. 22.16² =
  23. 23.15² =
  24. 24.24² =
  25. 25.29² =
  26. 26.16² =
  27. 27.11² =
  28. 28.29² =
  29. 29.12² =
  30. 30.23² =
  31. 31.12² =
  32. 32.19² =
  33. 33.14² =
  34. 34.26² =
  35. 35.17² =
  36. 36.17² =
  37. 37.21² =
  38. 38.12² =
  39. 39.19² =
  40. 40.26² =

Answer key

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

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