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Fraction comparison practice

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Which of these pairs can be compared directly (without using by considering residual amounts) by arguing from the number and size of pieces? (Same numerator, Same denominator and similar arguments)

38 and 37

512 and 23

415 and 615

38 and 215

34 and 56

Which of these pairs of fractions can be compared using the residual strategy?

34 and 56

78 and 1921

78 and 1012

79 and 1012

Find the error or omission in each of these explanations

A. 23 is bigger than 34 because thirds are larger than fourths.

B. 35 is bigger than 38 because fifths are bigger than eighths.

C. 78 is bigger than 1012 because 78 is fewer parts away from the whole.

D. 78 is bigger than 34 because it has more parts.      OR     68 is bigger than 34 because it has more parts.      OR     58 is bigger than 34 because it has more parts.

E. 78 is smaller than 34 because it has more parts in the whole.      OR     68 is smaller than 34 because it has more parts in the whole.      OR     58 is smaller than 34 because it has more parts in the whole.

F. 78 is bigger than 34 because it's closer to a whole.

G. 78 is bigger than 34 because 7 is a bigger part of 8 than 3 is of 4.

H. 25 is smaller than 58 because 25 is smaller than 12 and 58 is larger than 12 .

I. 28 is smaller than 38 because 2 is less than 3