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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 716 · 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. 3.18² =
  4. 4.25² =
  5. 5.14² =
  6. 6.12² =
  7. 7.24² =
  8. 8.21² =
  9. 9.28² =
  10. 10.13² =
  11. 11.15² =
  12. 12.23² =
  13. 13.22² =
  14. 14.19² =
  15. 15.29² =
  16. 16.26² =
  17. 17.25² =
  18. 18.27² =
  19. 19.11² =
  20. 20.18² =
  21. 21.19² =
  22. 22.25² =
  23. 23.24² =
  24. 24.28² =
  25. 25.25² =
  26. 26.21² =
  27. 27.21² =
  28. 28.14² =
  29. 29.19² =
  30. 30.16² =
  31. 31.21² =
  32. 32.11² =
  33. 33.12² =
  34. 34.13² =
  35. 35.29² =
  36. 36.11² =
  37. 37.25² =
  38. 38.14² =
  39. 39.14² =
  40. 40.19² =

Answer key

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

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