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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 57 · 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. 2.26² =
  3. 3.29² =
  4. 4.14² =
  5. 5.16² =
  6. 6.25² =
  7. 7.21² =
  8. 8.27² =
  9. 9.11² =
  10. 10.24² =
  11. 11.17² =
  12. 12.19² =
  13. 13.12² =
  14. 14.15² =
  15. 15.24² =
  16. 16.23² =
  17. 17.22² =
  18. 18.18² =
  19. 19.24² =
  20. 20.28² =
  21. 21.14² =
  22. 22.12² =
  23. 23.19² =
  24. 24.17² =
  25. 25.17² =
  26. 26.23² =
  27. 27.16² =
  28. 28.21² =
  29. 29.24² =
  30. 30.28² =
  31. 31.23² =
  32. 32.15² =
  33. 33.29² =
  34. 34.11² =
  35. 35.24² =
  36. 36.11² =
  37. 37.16² =
  38. 38.23² =
  39. 39.17² =
  40. 40.24² =

Answer key

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

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