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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 654 · 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. 2.28² =
  3. 3.22² =
  4. 4.17² =
  5. 5.26² =
  6. 6.12² =
  7. 7.21² =
  8. 8.11² =
  9. 9.29² =
  10. 10.25² =
  11. 11.14² =
  12. 12.23² =
  13. 13.18² =
  14. 14.24² =
  15. 15.15² =
  16. 16.19² =
  17. 17.13² =
  18. 18.13² =
  19. 19.24² =
  20. 20.27² =
  21. 21.12² =
  22. 22.27² =
  23. 23.24² =
  24. 24.16² =
  25. 25.15² =
  26. 26.21² =
  27. 27.15² =
  28. 28.28² =
  29. 29.14² =
  30. 30.14² =
  31. 31.12² =
  32. 32.29² =
  33. 33.12² =
  34. 34.26² =
  35. 35.24² =
  36. 36.27² =
  37. 37.14² =
  38. 38.29² =
  39. 39.19² =
  40. 40.17² =

Answer key

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

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