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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 415 · 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. 2.11² =
  3. 3.16² =
  4. 4.24² =
  5. 5.13² =
  6. 6.21² =
  7. 7.12² =
  8. 8.27² =
  9. 9.15² =
  10. 10.17² =
  11. 11.18² =
  12. 12.28² =
  13. 13.25² =
  14. 14.29² =
  15. 15.23² =
  16. 16.22² =
  17. 17.15² =
  18. 18.14² =
  19. 19.19² =
  20. 20.22² =
  21. 21.24² =
  22. 22.21² =
  23. 23.19² =
  24. 24.21² =
  25. 25.16² =
  26. 26.19² =
  27. 27.13² =
  28. 28.25² =
  29. 29.26² =
  30. 30.29² =
  31. 31.21² =
  32. 32.19² =
  33. 33.27² =
  34. 34.14² =
  35. 35.13² =
  36. 36.24² =
  37. 37.19² =
  38. 38.28² =
  39. 39.27² =
  40. 40.14² =

Answer key

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

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