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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 719 · 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. 1.12² =
  2. 2.18² =
  3. 3.19² =
  4. 4.24² =
  5. 5.28² =
  6. 6.17² =
  7. 7.13² =
  8. 8.14² =
  9. 9.16² =
  10. 10.29² =
  11. 11.21² =
  12. 12.22² =
  13. 13.15² =
  14. 14.11² =
  15. 15.27² =
  16. 16.26² =
  17. 17.22² =
  18. 18.25² =
  19. 19.15² =
  20. 20.23² =
  21. 21.27² =
  22. 22.25² =
  23. 23.14² =
  24. 24.24² =
  25. 25.19² =
  26. 26.16² =
  27. 27.11² =
  28. 28.14² =
  29. 29.15² =
  30. 30.23² =
  31. 31.11² =
  32. 32.27² =
  33. 33.13² =
  34. 34.11² =
  35. 35.25² =
  36. 36.14² =
  37. 37.16² =
  38. 38.18² =
  39. 39.17² =
  40. 40.14² =

Answer key

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

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