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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 379 · 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. 2.15² =
  3. 3.21² =
  4. 4.24² =
  5. 5.19² =
  6. 6.18² =
  7. 7.12² =
  8. 8.23² =
  9. 9.27² =
  10. 10.13² =
  11. 11.11² =
  12. 12.28² =
  13. 13.22² =
  14. 14.16² =
  15. 15.17² =
  16. 16.25² =
  17. 17.29² =
  18. 18.26² =
  19. 19.28² =
  20. 20.17² =
  21. 21.17² =
  22. 22.17² =
  23. 23.27² =
  24. 24.14² =
  25. 25.18² =
  26. 26.23² =
  27. 27.12² =
  28. 28.18² =
  29. 29.16² =
  30. 30.14² =
  31. 31.21² =
  32. 32.15² =
  33. 33.11² =
  34. 34.12² =
  35. 35.19² =
  36. 36.15² =
  37. 37.22² =
  38. 38.24² =
  39. 39.17² =
  40. 40.28² =

Answer key

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

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