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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 762 · 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. 1.17² =
  2. 2.21² =
  3. 3.12² =
  4. 4.16² =
  5. 5.26² =
  6. 6.11² =
  7. 7.15² =
  8. 8.14² =
  9. 9.19² =
  10. 10.23² =
  11. 11.13² =
  12. 12.27² =
  13. 13.25² =
  14. 14.22² =
  15. 15.24² =
  16. 16.18² =
  17. 17.22² =
  18. 18.28² =
  19. 19.16² =
  20. 20.29² =
  21. 21.22² =
  22. 22.14² =
  23. 23.23² =
  24. 24.27² =
  25. 25.24² =
  26. 26.12² =
  27. 27.21² =
  28. 28.11² =
  29. 29.13² =
  30. 30.19² =
  31. 31.11² =
  32. 32.12² =
  33. 33.29² =
  34. 34.24² =
  35. 35.12² =
  36. 36.16² =
  37. 37.23² =
  38. 38.15² =
  39. 39.16² =
  40. 40.13² =

Answer key

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

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