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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 120 · 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. 1.23² =
  2. 2.26² =
  3. 3.28² =
  4. 4.29² =
  5. 5.21² =
  6. 6.15² =
  7. 7.13² =
  8. 8.11² =
  9. 9.27² =
  10. 10.24² =
  11. 11.19² =
  12. 12.25² =
  13. 13.22² =
  14. 14.12² =
  15. 15.14² =
  16. 16.17² =
  17. 17.18² =
  18. 18.16² =
  19. 19.27² =
  20. 20.22² =
  21. 21.15² =
  22. 22.18² =
  23. 23.16² =
  24. 24.16² =
  25. 25.15² =
  26. 26.11² =
  27. 27.17² =
  28. 28.27² =
  29. 29.14² =
  30. 30.19² =
  31. 31.14² =
  32. 32.12² =
  33. 33.25² =
  34. 34.25² =
  35. 35.27² =
  36. 36.13² =
  37. 37.16² =
  38. 38.22² =
  39. 39.24² =
  40. 40.16² =

Answer key

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

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