Susan has a bag of marbles. She gives 2 marbles to her brother each day. If she starts with 10 marbles, how many marbles will Susan have left after 5 days?
A. 0
▶B. 2
C. 3
D. 4
To calculate the number of marbles Susan will have left after 5 days, we need to subtract the number of marbles she gives away each day from the total number of marbles she started with.
1. Susan starts with 10 marbles.
2. Each day, she gives away 2 marbles to her brother.
3. After 1 day, Susan will have 10 - 2 = 8 marbles left.
4. After 2 days, Susan will have 8 - 2 = 6 marbles left.
5. After 3 days, Susan will have 6 - 2 = 4 marbles left.
6. After 4 days, Susan will have 4 - 2 = 2 marbles left.
7. After 5 days, Susan will have 2 - 2 = 0 marbles left.
The answer is A. 0 marbles.
To solve this problem, we need to calculate the total number of marbles Susan would give to her brother in 5 days and subtract that from the starting number of marbles.
Since Susan gives 2 marbles to her brother each day, we can multiply the number of days (5) by the number of marbles given per day (2) to find out how many marbles she will give away in total.
5 days x 2 marbles/day = 10 marbles given away
Now, we subtract the number of marbles given away from the starting amount of 10 marbles.
10 marbles - 10 marbles = 0 marbles
Therefore, Susan will have 0 marbles left after 5 days.
The correct answer is A. 0