Question

Mrs. Corbett signed 1/2 of all the holiday cards and Mr. Corbett signed 3/8 of all of them. Mrs. Smith will sign the rest of them. If there were 32 cards in all, how many are left to be signed by Mrs. Smith?

Answer 1

Answer:

4 cards

Step-by-step explanation:

1. Approach

First, find how much ($\frac{1}{2}$) of all the holiday cards is. Then find out how much $\frac{3}{8}$ of all the cards is. After doing so, subtract both amounts from the total number of holiday cards.

2. Find out how many were signed

To find out how much a fraction of a certain value is, multiply the fraction by the value.

$32*\frac{1}{2}=16\\\\32*\frac{3}{8}=12$

3. Find out how many were left

Now subtract the number of signed cards from the total number of cards.

$32 -( 16 + 12)\\\\= 32 - 16 - 12\\\\= 16 - 12\\\\= 4$