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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 25 · 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. 2.17² =
  3. 3.22² =
  4. 4.29² =
  5. 5.19² =
  6. 6.16² =
  7. 7.26² =
  8. 8.21² =
  9. 9.11² =
  10. 10.15² =
  11. 11.14² =
  12. 12.28² =
  13. 13.25² =
  14. 14.23² =
  15. 15.12² =
  16. 16.27² =
  17. 17.12² =
  18. 18.21² =
  19. 19.24² =
  20. 20.21² =
  21. 21.22² =
  22. 22.25² =
  23. 23.18² =
  24. 24.21² =
  25. 25.21² =
  26. 26.26² =
  27. 27.19² =
  28. 28.11² =
  29. 29.16² =
  30. 30.21² =
  31. 31.17² =
  32. 32.13² =
  33. 33.15² =
  34. 34.18² =
  35. 35.23² =
  36. 36.12² =
  37. 37.16² =
  38. 38.26² =
  39. 39.27² =
  40. 40.14² =

Answer key

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

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