Answer:

2. 25/4 or 6 ¼

3. 5/14

4. 11/20

Step-by-step explanation:

Here's the traditional way to add fractions with two different denominators:

1. Find the LCM of the two denominators. Suppose you want to add the fractions 3/4 + 7/10. ...
2. Increase the terms of each fraction so that the denominator of each equals the LCM. ...
3. Substitute these two new fractions for the original ones and add.

Here's the traditional way to subtract fractions with two different denominators:

find the least common multiple (LCM) of the two denominators. To subtract fractions with unlike denominators, rename the fractions with a common denominator. Then subtract and simplify.

Here's the traditional way to multiply fractions with two different denominators:

1. Multiply the numerators together and place the product on the top of the resultant fraction
2. Multiply the denominators together and write the result at the bottom of the new fraction
3. Reduce or simplify the result if possible

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