A bakery sells three varieties of muffins. On a recent morning, the bakery sold 41 blueberry muffins, 27 banana nut muffins, and 20 black muffins. Estimate the total number of muffins sold.
A.
70
B.
90
C.
80
D.
100
The correct answer and Explanation is :
To estimate the total number of muffins sold, you first need to add up the quantities of each type of muffin sold: blueberry, banana nut, and black muffins. Here’s a step-by-step breakdown:
- List the Numbers:
- Blueberry muffins: 41
- Banana nut muffins: 27
- Black muffins: 20
- Add the Quantities:
To find the total number of muffins sold, simply sum these quantities:
[
41 + 27 + 20
] - Perform the Addition:
- First, add 41 and 27:
[
41 + 27 = 68
] - Next, add the result to 20:
[
68 + 20 = 88
]
- Estimate the Total:
The exact total is 88. To estimate this total, consider rounding each number to the nearest ten:
- 41 rounds to 40
- 27 rounds to 30
- 20 remains 20 Adding these rounded numbers:
[
40 + 30 + 20 = 90
]
Thus, the closest estimated total number of muffins sold is 90.
Explanation:
Estimating totals is useful when you want a quick approximation rather than a precise count. By rounding the numbers to the nearest ten, you simplify the calculation, making it easier to grasp the approximate total without complex arithmetic. In this case, rounding made the addition straightforward, leading to an estimate of 90 muffins. This estimation method is practical in various scenarios where exact numbers are less critical, such as budgeting or planning. The exact total of 88 muffins aligns closely with the rounded estimate of 90, demonstrating the effectiveness of this estimation technique.
Correct Answer: B. 90