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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 858 · 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. 1.27² =
  2. 2.11² =
  3. 3.26² =
  4. 4.24² =
  5. 5.22² =
  6. 6.13² =
  7. 7.21² =
  8. 8.16² =
  9. 9.28² =
  10. 10.18² =
  11. 11.23² =
  12. 12.29² =
  13. 13.19² =
  14. 14.14² =
  15. 15.12² =
  16. 16.17² =
  17. 17.15² =
  18. 18.25² =
  19. 19.15² =
  20. 20.13² =
  21. 21.21² =
  22. 22.22² =
  23. 23.29² =
  24. 24.12² =
  25. 25.25² =
  26. 26.15² =
  27. 27.21² =
  28. 28.17² =
  29. 29.16² =
  30. 30.16² =
  31. 31.24² =
  32. 32.19² =
  33. 33.12² =
  34. 34.29² =
  35. 35.19² =
  36. 36.13² =
  37. 37.22² =
  38. 38.22² =
  39. 39.24² =
  40. 40.14² =

Answer key

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

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