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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 908 · 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. 1.22² =
  2. 2.14² =
  3. 3.25² =
  4. 4.27² =
  5. 5.23² =
  6. 6.28² =
  7. 7.21² =
  8. 8.11² =
  9. 9.13² =
  10. 10.29² =
  11. 11.26² =
  12. 12.17² =
  13. 13.16² =
  14. 14.12² =
  15. 15.15² =
  16. 16.24² =
  17. 17.26² =
  18. 18.19² =
  19. 19.18² =
  20. 20.18² =
  21. 21.18² =
  22. 22.24² =
  23. 23.26² =
  24. 24.21² =
  25. 25.24² =
  26. 26.24² =
  27. 27.14² =
  28. 28.16² =
  29. 29.14² =
  30. 30.18² =
  31. 31.21² =
  32. 32.25² =
  33. 33.13² =
  34. 34.17² =
  35. 35.18² =
  36. 36.11² =
  37. 37.29² =
  38. 38.26² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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