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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 8 · 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. 1.13² =
  2. 2.17² =
  3. 3.23² =
  4. 4.18² =
  5. 5.14² =
  6. 6.27² =
  7. 7.25² =
  8. 8.12² =
  9. 9.15² =
  10. 10.11² =
  11. 11.29² =
  12. 12.26² =
  13. 13.22² =
  14. 14.19² =
  15. 15.16² =
  16. 16.21² =
  17. 17.19² =
  18. 18.28² =
  19. 19.24² =
  20. 20.21² =
  21. 21.27² =
  22. 22.17² =
  23. 23.15² =
  24. 24.16² =
  25. 25.21² =
  26. 26.15² =
  27. 27.12² =
  28. 28.25² =
  29. 29.13² =
  30. 30.14² =
  31. 31.24² =
  32. 32.26² =
  33. 33.29² =
  34. 34.15² =
  35. 35.22² =
  36. 36.21² =
  37. 37.25² =
  38. 38.24² =
  39. 39.21² =
  40. 40.12² =

Answer key

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

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