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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 711 · 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. 1.14² =
  2. 2.29² =
  3. 3.25² =
  4. 4.19² =
  5. 5.15² =
  6. 6.27² =
  7. 7.23² =
  8. 8.21² =
  9. 9.17² =
  10. 10.12² =
  11. 11.16² =
  12. 12.13² =
  13. 13.26² =
  14. 14.22² =
  15. 15.18² =
  16. 16.11² =
  17. 17.28² =
  18. 18.24² =
  19. 19.24² =
  20. 20.18² =
  21. 21.25² =
  22. 22.18² =
  23. 23.27² =
  24. 24.13² =
  25. 25.21² =
  26. 26.21² =
  27. 27.19² =
  28. 28.16² =
  29. 29.28² =
  30. 30.29² =
  31. 31.25² =
  32. 32.16² =
  33. 33.22² =
  34. 34.23² =
  35. 35.22² =
  36. 36.26² =
  37. 37.18² =
  38. 38.23² =
  39. 39.28² =
  40. 40.14² =

Answer key

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

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