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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 598 · 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. 1.19² =
  2. 2.14² =
  3. 3.21² =
  4. 4.25² =
  5. 5.16² =
  6. 6.26² =
  7. 7.15² =
  8. 8.22² =
  9. 9.11² =
  10. 10.28² =
  11. 11.29² =
  12. 12.12² =
  13. 13.18² =
  14. 14.17² =
  15. 15.13² =
  16. 16.24² =
  17. 17.23² =
  18. 18.27² =
  19. 19.23² =
  20. 20.24² =
  21. 21.14² =
  22. 22.28² =
  23. 23.14² =
  24. 24.11² =
  25. 25.11² =
  26. 26.26² =
  27. 27.15² =
  28. 28.18² =
  29. 29.27² =
  30. 30.14² =
  31. 31.29² =
  32. 32.18² =
  33. 33.28² =
  34. 34.22² =
  35. 35.13² =
  36. 36.14² =
  37. 37.17² =
  38. 38.27² =
  39. 39.17² =
  40. 40.28² =

Answer key

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

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