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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 988 · 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. 1.13² =
  2. 2.26² =
  3. 3.11² =
  4. 4.28² =
  5. 5.15² =
  6. 6.17² =
  7. 7.22² =
  8. 8.21² =
  9. 9.25² =
  10. 10.18² =
  11. 11.23² =
  12. 12.24² =
  13. 13.14² =
  14. 14.16² =
  15. 15.29² =
  16. 16.12² =
  17. 17.27² =
  18. 18.12² =
  19. 19.13² =
  20. 20.16² =
  21. 21.16² =
  22. 22.19² =
  23. 23.29² =
  24. 24.15² =
  25. 25.11² =
  26. 26.13² =
  27. 27.24² =
  28. 28.25² =
  29. 29.28² =
  30. 30.15² =
  31. 31.12² =
  32. 32.18² =
  33. 33.18² =
  34. 34.21² =
  35. 35.15² =
  36. 36.21² =
  37. 37.26² =
  38. 38.24² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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