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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 172 · 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. 1.26² =
  2. 2.13² =
  3. 3.17² =
  4. 4.27² =
  5. 5.25² =
  6. 6.12² =
  7. 7.19² =
  8. 8.21² =
  9. 9.14² =
  10. 10.29² =
  11. 11.24² =
  12. 12.11² =
  13. 13.23² =
  14. 14.16² =
  15. 15.28² =
  16. 16.18² =
  17. 17.22² =
  18. 18.15² =
  19. 19.25² =
  20. 20.18² =
  21. 21.27² =
  22. 22.14² =
  23. 23.21² =
  24. 24.23² =
  25. 25.18² =
  26. 26.28² =
  27. 27.21² =
  28. 28.11² =
  29. 29.19² =
  30. 30.12² =
  31. 31.16² =
  32. 32.12² =
  33. 33.14² =
  34. 34.29² =
  35. 35.25² =
  36. 36.17² =
  37. 37.21² =
  38. 38.16² =
  39. 39.27² =
  40. 40.28² =

Answer key

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

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