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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 244 · 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. 1.17² =
  2. 2.19² =
  3. 3.18² =
  4. 4.11² =
  5. 5.21² =
  6. 6.12² =
  7. 7.22² =
  8. 8.26² =
  9. 9.29² =
  10. 10.15² =
  11. 11.25² =
  12. 12.28² =
  13. 13.13² =
  14. 14.23² =
  15. 15.14² =
  16. 16.27² =
  17. 17.18² =
  18. 18.24² =
  19. 19.16² =
  20. 20.24² =
  21. 21.28² =
  22. 22.13² =
  23. 23.23² =
  24. 24.19² =
  25. 25.19² =
  26. 26.23² =
  27. 27.14² =
  28. 28.19² =
  29. 29.12² =
  30. 30.23² =
  31. 31.25² =
  32. 32.18² =
  33. 33.16² =
  34. 34.14² =
  35. 35.19² =
  36. 36.26² =
  37. 37.22² =
  38. 38.21² =
  39. 39.24² =
  40. 40.28² =

Answer key

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

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