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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 340 · 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. 2.13² =
  3. 3.29² =
  4. 4.27² =
  5. 5.21² =
  6. 6.19² =
  7. 7.24² =
  8. 8.26² =
  9. 9.12² =
  10. 10.18² =
  11. 11.25² =
  12. 12.16² =
  13. 13.15² =
  14. 14.23² =
  15. 15.22² =
  16. 16.17² =
  17. 17.28² =
  18. 18.11² =
  19. 19.29² =
  20. 20.15² =
  21. 21.21² =
  22. 22.14² =
  23. 23.13² =
  24. 24.23² =
  25. 25.12² =
  26. 26.24² =
  27. 27.21² =
  28. 28.15² =
  29. 29.14² =
  30. 30.14² =
  31. 31.26² =
  32. 32.25² =
  33. 33.27² =
  34. 34.22² =
  35. 35.25² =
  36. 36.19² =
  37. 37.25² =
  38. 38.11² =
  39. 39.27² =
  40. 40.14² =

Answer key

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

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