Can you check these, please(studying order of operations).
1. Sam bought two CDs for $13 each. Sales tax for both CDs was $3. Write an expression to show how much Sam paid in all.
Ans: 13*2+3
2. Alicia made 24 chocolate chip cookies and 36 sugar cookies. Then she divided all the cookies into 10 bags to sell at the bake sale. Write an expression to show how many cookies she put into each bag?
Ans: (24+36)/10
Both are right.
Thanks!
You're welcome.
Sure! Let's check those expressions.
1. Sam bought two CDs for $13 each. Sales tax for both CDs was $3. To find out how much Sam paid in all, we can multiply the cost of one CD by the number of CDs and then add the sales tax.
The expression would be: 13 * 2 + 3.
To evaluate this expression, follow the order of operations, also known as PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
Step-by-step evaluation:
1. Multiply: 13 * 2 = 26.
2. Add: 26 + 3 = 29.
So, Sam paid a total of $29.
2. Alicia made 24 chocolate chip cookies and 36 sugar cookies. Then she divided all the cookies into 10 bags to sell at the bake sale. To find out how many cookies she put into each bag, we need to divide the total number of cookies by the number of bags.
The expression would be: (24 + 36) / 10.
Again, we use the order of operations to evaluate this expression.
Step-by-step evaluation:
1. Addition: 24 + 36 = 60.
2. Division: 60 / 10 = 6.
So, Alicia put 6 cookies into each bag.