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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 560 · 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. 2.18² =
  3. 3.27² =
  4. 4.17² =
  5. 5.26² =
  6. 6.11² =
  7. 7.12² =
  8. 8.21² =
  9. 9.14² =
  10. 10.22² =
  11. 11.15² =
  12. 12.13² =
  13. 13.28² =
  14. 14.24² =
  15. 15.25² =
  16. 16.16² =
  17. 17.14² =
  18. 18.29² =
  19. 19.21² =
  20. 20.23² =
  21. 21.24² =
  22. 22.19² =
  23. 23.19² =
  24. 24.21² =
  25. 25.29² =
  26. 26.18² =
  27. 27.15² =
  28. 28.11² =
  29. 29.21² =
  30. 30.13² =
  31. 31.16² =
  32. 32.11² =
  33. 33.12² =
  34. 34.29² =
  35. 35.22² =
  36. 36.11² =
  37. 37.22² =
  38. 38.19² =
  39. 39.27² =
  40. 40.25² =

Answer key

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

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