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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 70 · 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. 3.24² =
  4. 4.14² =
  5. 5.18² =
  6. 6.21² =
  7. 7.13² =
  8. 8.25² =
  9. 9.11² =
  10. 10.22² =
  11. 11.26² =
  12. 12.15² =
  13. 13.16² =
  14. 14.19² =
  15. 15.17² =
  16. 16.23² =
  17. 17.29² =
  18. 18.25² =
  19. 19.18² =
  20. 20.26² =
  21. 21.27² =
  22. 22.16² =
  23. 23.18² =
  24. 24.27² =
  25. 25.18² =
  26. 26.19² =
  27. 27.28² =
  28. 28.24² =
  29. 29.12² =
  30. 30.24² =
  31. 31.16² =
  32. 32.19² =
  33. 33.15² =
  34. 34.23² =
  35. 35.24² =
  36. 36.28² =
  37. 37.14² =
  38. 38.28² =
  39. 39.21² =
  40. 40.29² =

Answer key

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

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