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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 328 · 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. 1.27² =
  2. 2.19² =
  3. 3.15² =
  4. 4.29² =
  5. 5.24² =
  6. 6.28² =
  7. 7.21² =
  8. 8.11² =
  9. 9.16² =
  10. 10.18² =
  11. 11.17² =
  12. 12.14² =
  13. 13.12² =
  14. 14.26² =
  15. 15.13² =
  16. 16.22² =
  17. 17.24² =
  18. 18.25² =
  19. 19.23² =
  20. 20.24² =
  21. 21.29² =
  22. 22.14² =
  23. 23.19² =
  24. 24.21² =
  25. 25.15² =
  26. 26.22² =
  27. 27.13² =
  28. 28.11² =
  29. 29.13² =
  30. 30.19² =
  31. 31.25² =
  32. 32.27² =
  33. 33.25² =
  34. 34.17² =
  35. 35.16² =
  36. 36.17² =
  37. 37.13² =
  38. 38.13² =
  39. 39.28² =
  40. 40.11² =

Answer key

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

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