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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 294 · 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. 1.18² =
  2. 2.14² =
  3. 3.27² =
  4. 4.16² =
  5. 5.23² =
  6. 6.13² =
  7. 7.22² =
  8. 8.21² =
  9. 9.11² =
  10. 10.17² =
  11. 11.12² =
  12. 12.25² =
  13. 13.29² =
  14. 14.19² =
  15. 15.15² =
  16. 16.28² =
  17. 17.24² =
  18. 18.18² =
  19. 19.15² =
  20. 20.11² =
  21. 21.27² =
  22. 22.22² =
  23. 23.24² =
  24. 24.21² =
  25. 25.16² =
  26. 26.26² =
  27. 27.11² =
  28. 28.29² =
  29. 29.11² =
  30. 30.27² =
  31. 31.18² =
  32. 32.16² =
  33. 33.14² =
  34. 34.14² =
  35. 35.24² =
  36. 36.19² =
  37. 37.23² =
  38. 38.24² =
  39. 39.28² =
  40. 40.27² =

Answer key

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

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