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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 193 · 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. 2.24² =
  3. 3.17² =
  4. 4.28² =
  5. 5.21² =
  6. 6.16² =
  7. 7.27² =
  8. 8.12² =
  9. 9.11² =
  10. 10.22² =
  11. 11.29² =
  12. 12.23² =
  13. 13.14² =
  14. 14.15² =
  15. 15.19² =
  16. 16.26² =
  17. 17.18² =
  18. 18.18² =
  19. 19.13² =
  20. 20.25² =
  21. 21.26² =
  22. 22.13² =
  23. 23.16² =
  24. 24.18² =
  25. 25.21² =
  26. 26.15² =
  27. 27.13² =
  28. 28.11² =
  29. 29.24² =
  30. 30.23² =
  31. 31.21² =
  32. 32.28² =
  33. 33.27² =
  34. 34.21² =
  35. 35.14² =
  36. 36.22² =
  37. 37.24² =
  38. 38.28² =
  39. 39.19² =
  40. 40.16² =

Answer key

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

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