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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 578 · 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. 1.21² =
  2. 2.11² =
  3. 3.13² =
  4. 4.12² =
  5. 5.15² =
  6. 6.19² =
  7. 7.25² =
  8. 8.23² =
  9. 9.26² =
  10. 10.28² =
  11. 11.29² =
  12. 12.17² =
  13. 13.18² =
  14. 14.27² =
  15. 15.16² =
  16. 16.14² =
  17. 17.22² =
  18. 18.24² =
  19. 19.28² =
  20. 20.12² =
  21. 21.21² =
  22. 22.16² =
  23. 23.12² =
  24. 24.11² =
  25. 25.28² =
  26. 26.16² =
  27. 27.16² =
  28. 28.16² =
  29. 29.27² =
  30. 30.27² =
  31. 31.11² =
  32. 32.29² =
  33. 33.21² =
  34. 34.14² =
  35. 35.24² =
  36. 36.11² =
  37. 37.17² =
  38. 38.11² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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