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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 109 · 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. 3.18² =
  4. 4.13² =
  5. 5.22² =
  6. 6.27² =
  7. 7.15² =
  8. 8.11² =
  9. 9.16² =
  10. 10.28² =
  11. 11.29² =
  12. 12.25² =
  13. 13.19² =
  14. 14.23² =
  15. 15.14² =
  16. 16.26² =
  17. 17.24² =
  18. 18.17² =
  19. 19.11² =
  20. 20.24² =
  21. 21.27² =
  22. 22.22² =
  23. 23.12² =
  24. 24.19² =
  25. 25.14² =
  26. 26.27² =
  27. 27.15² =
  28. 28.16² =
  29. 29.21² =
  30. 30.18² =
  31. 31.23² =
  32. 32.16² =
  33. 33.22² =
  34. 34.12² =
  35. 35.25² =
  36. 36.27² =
  37. 37.13² =
  38. 38.16² =
  39. 39.14² =
  40. 40.13² =

Answer key

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

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