One slice of bread is 80 calorie. Approximately how many calories are in 2 ½ slices of bread?
A. 140 calories
B. 200 calories
C. 220 calories
D. 240 calories
E. 260 calories
The Correct Answer and Explanation is :
To determine the number of calories in 2 ½ slices of bread, you need to multiply the calories per slice by the number of slices.
Step 1: Identify the number of calories per slice of bread
We are told that one slice of bread contains 80 calories.
Step 2: Multiply by the number of slices
Now, we need to calculate the total number of calories in 2 ½ slices. To do this, we multiply 80 calories per slice by 2 ½ slices. Since 2 ½ can be written as 2.5, we perform the following multiplication:
[
80 \times 2.5 = 200 \, \text{calories}
]
Step 3: Interpret the result
The result of 80 calories per slice multiplied by 2.5 slices is 200 calories.
Thus, the correct answer is B. 200 calories.
Explanation:
- Calories per slice: The bread is specified to have 80 calories per slice.
- Number of slices: We are considering 2 ½ slices, which is the same as multiplying by 2.5.
- Multiplication: 80 calories per slice × 2.5 slices = 200 calories.
This approach can be applied to other food items as well by determining the calories per unit (in this case, per slice) and multiplying it by the number of units (slices) consumed.
Additional Considerations:
- In cases where the portion size is not a whole number, like 2 ½ slices, it is important to express the fraction as a decimal or to use fraction multiplication.
- If you need to calculate this for larger or smaller quantities, simply adjust the numbers and repeat the multiplication process. This method helps in understanding the calorie content of varying portion sizes efficiently.