Question

Shen’s mother gave him $10 to go buy groceries. He picked up a gallon of milk for $3.49, three pounds of oranges that cost $1.14 per pound, and a box of cereal for $3.46. Shen used front-end estimation to determine whether he had enough money for the groceries. How much did he estimate the total cost would be?

Answer 1

he estimated that it would be about $9.00

Answer 2

$9.

Explanation:

We have been given that Shen’s mother gave him $10 to go buy groceries. He picked up a gallon of milk for $3.49, three pounds of oranges that cost $1.14 per pound, and a box of cereal for $3.46.

In front-end estimation, we round whatever number is in front instead of rounding each number to a given place value.

We can see that in $3.49, front number is and second number is less than 5, so we will round it down to $3.

Similarly, in $3.46, 1st number is 3 and second number is less than 5, so we will round it down to $3.

In $1.14, front or 1st number is 1 and second number is less than 5, so we will round down to $1. Cost of three orange boxes would be
`\$1*3=\$3`.

`\text{Total estimated cost}=\$3+\$3+\$3`

`\text{Total estimated cost}=\$9`

Therefore, the total estimated cost of groceries is $9.