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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 192 · 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. 2.12² =
  3. 3.14² =
  4. 4.28² =
  5. 5.13² =
  6. 6.17² =
  7. 7.21² =
  8. 8.22² =
  9. 9.24² =
  10. 10.25² =
  11. 11.19² =
  12. 12.11² =
  13. 13.15² =
  14. 14.16² =
  15. 15.23² =
  16. 16.29² =
  17. 17.26² =
  18. 18.18² =
  19. 19.26² =
  20. 20.24² =
  21. 21.12² =
  22. 22.29² =
  23. 23.24² =
  24. 24.26² =
  25. 25.25² =
  26. 26.16² =
  27. 27.26² =
  28. 28.18² =
  29. 29.21² =
  30. 30.21² =
  31. 31.16² =
  32. 32.25² =
  33. 33.11² =
  34. 34.11² =
  35. 35.19² =
  36. 36.13² =
  37. 37.25² =
  38. 38.18² =
  39. 39.25² =
  40. 40.21² =

Answer key

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

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