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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 615 · 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. 1.18² =
  2. 2.27² =
  3. 3.21² =
  4. 4.13² =
  5. 5.11² =
  6. 6.22² =
  7. 7.16² =
  8. 8.23² =
  9. 9.12² =
  10. 10.28² =
  11. 11.26² =
  12. 12.24² =
  13. 13.25² =
  14. 14.22² =
  15. 15.19² =
  16. 16.14² =
  17. 17.15² =
  18. 18.17² =
  19. 19.29² =
  20. 20.22² =
  21. 21.16² =
  22. 22.21² =
  23. 23.19² =
  24. 24.29² =
  25. 25.21² =
  26. 26.16² =
  27. 27.27² =
  28. 28.21² =
  29. 29.11² =
  30. 30.17² =
  31. 31.22² =
  32. 32.11² =
  33. 33.16² =
  34. 34.21² =
  35. 35.25² =
  36. 36.15² =
  37. 37.29² =
  38. 38.16² =
  39. 39.29² =
  40. 40.11² =

Answer key

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

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