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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 351 · 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. 1.24² =
  2. 2.13² =
  3. 3.26² =
  4. 4.27² =
  5. 5.17² =
  6. 6.29² =
  7. 7.12² =
  8. 8.23² =
  9. 9.21² =
  10. 10.11² =
  11. 11.15² =
  12. 12.25² =
  13. 13.22² =
  14. 14.14² =
  15. 15.18² =
  16. 16.28² =
  17. 17.13² =
  18. 18.19² =
  19. 19.16² =
  20. 20.22² =
  21. 21.22² =
  22. 22.29² =
  23. 23.11² =
  24. 24.22² =
  25. 25.24² =
  26. 26.26² =
  27. 27.11² =
  28. 28.28² =
  29. 29.12² =
  30. 30.26² =
  31. 31.27² =
  32. 32.21² =
  33. 33.18² =
  34. 34.29² =
  35. 35.21² =
  36. 36.27² =
  37. 37.28² =
  38. 38.15² =
  39. 39.11² =
  40. 40.26² =

Answer key

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

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