Answer :

Final answer:

To estimate the difference of 18/20 - 5/8, convert the fractions to have a common denominator and subtract, resulting in an estimated difference of 11/40.

Explanation:

The equation to estimate the difference between 18/20 and 5/8 involves finding a common denominator and then subtracting the two fractions. For reference, 18/20 simplifies to 9/10, and 5/8 remains as it is because it cannot be simplified further. We can make the denominators the same by converting them to 40 (the least common multiple of 20 and 8). Thus, the equation becomes (9/10) × (40/40) - (5/8) × (40/40) which simplifies to 36/40 - 25/40. Finally, subtracting these gives us an estimated difference of 11/40.

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