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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 48 · 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. 3.14² =
  4. 4.15² =
  5. 5.11² =
  6. 6.26² =
  7. 7.19² =
  8. 8.27² =
  9. 9.24² =
  10. 10.18² =
  11. 11.23² =
  12. 12.21² =
  13. 13.29² =
  14. 14.12² =
  15. 15.28² =
  16. 16.22² =
  17. 17.16² =
  18. 18.21² =
  19. 19.21² =
  20. 20.25² =
  21. 21.11² =
  22. 22.15² =
  23. 23.25² =
  24. 24.28² =
  25. 25.16² =
  26. 26.29² =
  27. 27.28² =
  28. 28.12² =
  29. 29.17² =
  30. 30.13² =
  31. 31.24² =
  32. 32.22² =
  33. 33.15² =
  34. 34.28² =
  35. 35.25² =
  36. 36.25² =
  37. 37.24² =
  38. 38.27² =
  39. 39.16² =
  40. 40.16² =

Answer key

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

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