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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 134 · 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. 2.28² =
  3. 3.26² =
  4. 4.14² =
  5. 5.24² =
  6. 6.27² =
  7. 7.21² =
  8. 8.29² =
  9. 9.18² =
  10. 10.12² =
  11. 11.22² =
  12. 12.13² =
  13. 13.17² =
  14. 14.16² =
  15. 15.11² =
  16. 16.25² =
  17. 17.15² =
  18. 18.24² =
  19. 19.23² =
  20. 20.16² =
  21. 21.27² =
  22. 22.13² =
  23. 23.13² =
  24. 24.12² =
  25. 25.22² =
  26. 26.13² =
  27. 27.12² =
  28. 28.25² =
  29. 29.28² =
  30. 30.18² =
  31. 31.18² =
  32. 32.26² =
  33. 33.18² =
  34. 34.26² =
  35. 35.21² =
  36. 36.17² =
  37. 37.11² =
  38. 38.11² =
  39. 39.13² =
  40. 40.27² =

Answer key

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

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