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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 870 · 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. 2.14² =
  3. 3.25² =
  4. 4.21² =
  5. 5.17² =
  6. 6.15² =
  7. 7.28² =
  8. 8.19² =
  9. 9.22² =
  10. 10.29² =
  11. 11.13² =
  12. 12.18² =
  13. 13.12² =
  14. 14.27² =
  15. 15.14² =
  16. 16.11² =
  17. 17.23² =
  18. 18.24² =
  19. 19.16² =
  20. 20.16² =
  21. 21.22² =
  22. 22.17² =
  23. 23.11² =
  24. 24.18² =
  25. 25.19² =
  26. 26.28² =
  27. 27.19² =
  28. 28.21² =
  29. 29.13² =
  30. 30.19² =
  31. 31.19² =
  32. 32.13² =
  33. 33.14² =
  34. 34.26² =
  35. 35.25² =
  36. 36.18² =
  37. 37.28² =
  38. 38.22² =
  39. 39.24² =
  40. 40.17² =

Answer key

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

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