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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 58 · 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. 1.11² =
  2. 2.17² =
  3. 3.28² =
  4. 4.29² =
  5. 5.12² =
  6. 6.13² =
  7. 7.15² =
  8. 8.23² =
  9. 9.19² =
  10. 10.22² =
  11. 11.26² =
  12. 12.21² =
  13. 13.25² =
  14. 14.27² =
  15. 15.14² =
  16. 16.24² =
  17. 17.16² =
  18. 18.26² =
  19. 19.18² =
  20. 20.17² =
  21. 21.14² =
  22. 22.23² =
  23. 23.18² =
  24. 24.26² =
  25. 25.19² =
  26. 26.16² =
  27. 27.18² =
  28. 28.26² =
  29. 29.24² =
  30. 30.12² =
  31. 31.23² =
  32. 32.19² =
  33. 33.11² =
  34. 34.29² =
  35. 35.13² =
  36. 36.27² =
  37. 37.11² =
  38. 38.26² =
  39. 39.26² =
  40. 40.27² =

Answer key

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

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