Ethan ordered 4 sub sandwiches for a party. Each 1/2 sandwich is one serving. Does he have enough to serve 7 friends? How much is leftover or how much more is needed? Explain.

4*2 = 8 servings

Explain me please!

To determine whether Ethan has enough sandwiches to serve 7 friends, we need to calculate the total number of sandwich servings he has.

Ethan ordered 4 sub sandwiches, and each 1/2 sandwich is one serving. Therefore, each whole sub sandwich is equivalent to 2 servings (1/2 sandwich x 2 = 1 serving).

To find the total number of servings, we multiply the number of sandwiches by the number of servings per whole sandwich:
4 sandwiches x 2 servings per sandwich = 8 servings

So, Ethan has a total of 8 sandwich servings.

Now let's compare this with the number of friends he wants to serve, which is 7.

If there are more or an equal number of servings than friends, then he has enough to serve everyone. In this case, Ethan has more servings (8) than friends (7), so he does have enough to serve everyone.

To determine the leftover or additional sandwiches needed, we subtract the number of friends from the number of servings:
8 servings - 7 friends = 1 leftover serving

Therefore, Ethan will have 1 leftover serving after serving all his friends.