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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 660 · 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. 2.21² =
  3. 3.18² =
  4. 4.14² =
  5. 5.25² =
  6. 6.13² =
  7. 7.28² =
  8. 8.17² =
  9. 9.19² =
  10. 10.27² =
  11. 11.22² =
  12. 12.26² =
  13. 13.24² =
  14. 14.16² =
  15. 15.15² =
  16. 16.23² =
  17. 17.11² =
  18. 18.29² =
  19. 19.23² =
  20. 20.13² =
  21. 21.18² =
  22. 22.21² =
  23. 23.11² =
  24. 24.19² =
  25. 25.29² =
  26. 26.15² =
  27. 27.28² =
  28. 28.29² =
  29. 29.27² =
  30. 30.24² =
  31. 31.19² =
  32. 32.24² =
  33. 33.17² =
  34. 34.18² =
  35. 35.14² =
  36. 36.17² =
  37. 37.21² =
  38. 38.16² =
  39. 39.27² =
  40. 40.14² =

Answer key

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

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