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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 978 · 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. 1.17² =
  2. 2.25² =
  3. 3.12² =
  4. 4.26² =
  5. 5.11² =
  6. 6.15² =
  7. 7.19² =
  8. 8.27² =
  9. 9.24² =
  10. 10.18² =
  11. 11.23² =
  12. 12.16² =
  13. 13.13² =
  14. 14.22² =
  15. 15.14² =
  16. 16.21² =
  17. 17.29² =
  18. 18.28² =
  19. 19.25² =
  20. 20.17² =
  21. 21.25² =
  22. 22.14² =
  23. 23.27² =
  24. 24.22² =
  25. 25.15² =
  26. 26.24² =
  27. 27.25² =
  28. 28.21² =
  29. 29.22² =
  30. 30.28² =
  31. 31.25² =
  32. 32.13² =
  33. 33.28² =
  34. 34.15² =
  35. 35.21² =
  36. 36.16² =
  37. 37.28² =
  38. 38.13² =
  39. 39.15² =
  40. 40.25² =

Answer key

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

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