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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 382 · 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. 2.21² =
  3. 3.16² =
  4. 4.14² =
  5. 5.23² =
  6. 6.13² =
  7. 7.25² =
  8. 8.17² =
  9. 9.11² =
  10. 10.27² =
  11. 11.24² =
  12. 12.28² =
  13. 13.12² =
  14. 14.22² =
  15. 15.18² =
  16. 16.29² =
  17. 17.15² =
  18. 18.12² =
  19. 19.21² =
  20. 20.13² =
  21. 21.19² =
  22. 22.27² =
  23. 23.14² =
  24. 24.21² =
  25. 25.28² =
  26. 26.22² =
  27. 27.22² =
  28. 28.19² =
  29. 29.14² =
  30. 30.21² =
  31. 31.24² =
  32. 32.19² =
  33. 33.29² =
  34. 34.13² =
  35. 35.22² =
  36. 36.19² =
  37. 37.27² =
  38. 38.29² =
  39. 39.15² =
  40. 40.11² =

Answer key

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

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