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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 93 · 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. 1.21² =
  2. 2.12² =
  3. 3.17² =
  4. 4.25² =
  5. 5.13² =
  6. 6.24² =
  7. 7.19² =
  8. 8.16² =
  9. 9.28² =
  10. 10.29² =
  11. 11.11² =
  12. 12.22² =
  13. 13.14² =
  14. 14.15² =
  15. 15.24² =
  16. 16.18² =
  17. 17.27² =
  18. 18.26² =
  19. 19.23² =
  20. 20.29² =
  21. 21.11² =
  22. 22.14² =
  23. 23.24² =
  24. 24.19² =
  25. 25.16² =
  26. 26.19² =
  27. 27.12² =
  28. 28.17² =
  29. 29.11² =
  30. 30.15² =
  31. 31.14² =
  32. 32.18² =
  33. 33.14² =
  34. 34.25² =
  35. 35.16² =
  36. 36.21² =
  37. 37.24² =
  38. 38.12² =
  39. 39.27² =
  40. 40.29² =

Answer key

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

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