Hallie bikes 1 5/8 km before lunch and 6 1/4 km after lunch. how much farther does hallie bike after lunch than before lunch? express your answer as a mixed number in simplest form.

4 km

Step-by-step explanation:

To find how much farther Hallie biked after lunch compared to the amount she biked before lunch, we can subtract the amounts:

6

However, we can only subtract fractions that have the same denominator, so we need to convert to a fraction with a denominator of 8:

Now, we can't subtract 2 from 8, so we need to 'borrow' from the 6 to make the fraction larger:

Now subtract:

2nd one in the first row is correct

5/12, or 5: 12

step-by-step explanation: