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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 699 · 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. 1.16² =
  2. 2.17² =
  3. 3.28² =
  4. 4.22² =
  5. 5.15² =
  6. 6.26² =
  7. 7.12² =
  8. 8.25² =
  9. 9.23² =
  10. 10.13² =
  11. 11.24² =
  12. 12.27² =
  13. 13.21² =
  14. 14.18² =
  15. 15.29² =
  16. 16.14² =
  17. 17.19² =
  18. 18.11² =
  19. 19.13² =
  20. 20.16² =
  21. 21.15² =
  22. 22.13² =
  23. 23.29² =
  24. 24.21² =
  25. 25.27² =
  26. 26.25² =
  27. 27.23² =
  28. 28.11² =
  29. 29.16² =
  30. 30.28² =
  31. 31.11² =
  32. 32.13² =
  33. 33.23² =
  34. 34.14² =
  35. 35.11² =
  36. 36.26² =
  37. 37.16² =
  38. 38.25² =
  39. 39.22² =
  40. 40.19² =

Answer key

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

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