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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 371 · 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. 2.28² =
  3. 3.19² =
  4. 4.11² =
  5. 5.23² =
  6. 6.21² =
  7. 7.14² =
  8. 8.27² =
  9. 9.12² =
  10. 10.26² =
  11. 11.24² =
  12. 12.15² =
  13. 13.25² =
  14. 14.17² =
  15. 15.16² =
  16. 16.22² =
  17. 17.18² =
  18. 18.25² =
  19. 19.29² =
  20. 20.26² =
  21. 21.14² =
  22. 22.11² =
  23. 23.17² =
  24. 24.25² =
  25. 25.18² =
  26. 26.26² =
  27. 27.21² =
  28. 28.15² =
  29. 29.27² =
  30. 30.18² =
  31. 31.21² =
  32. 32.24² =
  33. 33.14² =
  34. 34.19² =
  35. 35.21² =
  36. 36.22² =
  37. 37.16² =
  38. 38.29² =
  39. 39.21² =
  40. 40.11² =

Answer key

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

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