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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 86 · 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. 1.19² =
  2. 2.13² =
  3. 3.27² =
  4. 4.18² =
  5. 5.26² =
  6. 6.14² =
  7. 7.21² =
  8. 8.15² =
  9. 9.16² =
  10. 10.17² =
  11. 11.11² =
  12. 12.25² =
  13. 13.22² =
  14. 14.29² =
  15. 15.28² =
  16. 16.19² =
  17. 17.24² =
  18. 18.12² =
  19. 19.23² =
  20. 20.12² =
  21. 21.12² =
  22. 22.26² =
  23. 23.22² =
  24. 24.29² =
  25. 25.19² =
  26. 26.13² =
  27. 27.27² =
  28. 28.14² =
  29. 29.24² =
  30. 30.26² =
  31. 31.18² =
  32. 32.23² =
  33. 33.14² =
  34. 34.22² =
  35. 35.26² =
  36. 36.25² =
  37. 37.29² =
  38. 38.11² =
  39. 39.18² =
  40. 40.14² =

Answer key

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

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