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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 75 · 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. 1.28² =
  2. 2.12² =
  3. 3.29² =
  4. 4.19² =
  5. 5.18² =
  6. 6.24² =
  7. 7.17² =
  8. 8.21² =
  9. 9.11² =
  10. 10.15² =
  11. 11.25² =
  12. 12.16² =
  13. 13.14² =
  14. 14.26² =
  15. 15.27² =
  16. 16.23² =
  17. 17.22² =
  18. 18.13² =
  19. 19.21² =
  20. 20.16² =
  21. 21.15² =
  22. 22.26² =
  23. 23.22² =
  24. 24.24² =
  25. 25.13² =
  26. 26.27² =
  27. 27.23² =
  28. 28.24² =
  29. 29.24² =
  30. 30.27² =
  31. 31.26² =
  32. 32.15² =
  33. 33.29² =
  34. 34.28² =
  35. 35.25² =
  36. 36.16² =
  37. 37.16² =
  38. 38.28² =
  39. 39.21² =
  40. 40.11² =

Answer key

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

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