Since the question wants to know how many ingredients she used, All we have to do is add them.
So as the question says, she used 6/10 flour, 3 eggs, and 4/5 sugar.
Now we have two fractions in this scenario. Let's make them have the same denominator. Either we divide 6/10 by 2 or multiply 4/5 by 2. Let's multiply.
4/5 × 2 = 8/10
Now we have 6/10, 3, and 8/10
Lets add them together.
3 + 6/10 = 3 and 6/10
Now 3 and 6/10 + 8/10 = 4 and 4/10
Simplify even further...
and your answer will be 4 and 2/5
