Answer:
1. 500 students.
2. 440 students.
3. 437 students; Rounding the number of students to nearest ten is closer to actual total.
Step-by-step explanation:
We have been given that students at Rockwell elementary school either chose burritos or pizza. Yesterday 185 students chose burritos and 252 chose pizza.
1. To round the number of students who chose burritos and pizzas to nearest hundred, we will see the ten value is less than 5 or greater than and equal to 5. For a ten value less than 5 we round down to nearest hundred and for a ten value greater than or equal to 5, we round up to nearest hundred.
We can see that in 185, there are are 8 tens, so we will round up our number to nearest hundred, that will be 200.
As there are 5 tens in number 252, so we will round up our number to nearest hundred, that will be 300.
[tex]\text{Total number of students by rounding each number to the nearest hundred}=200+300[/tex]
[tex]\text{Total number of students by rounding each number to the nearest hundred}=500[/tex]
Therefore, the estimated number of students by rounding each number to the nearest hundred will be 500 students.
2. To round the number of students, who chose burritos and pizzas to nearest ten, we will see the ones value is less than 5 or greater than and equal to 5. For a ones value less than 5 we round down to nearest ten and for a ones value greater than or equal to 5, we round up to nearest ten.
We can see that in 185, there are are 5 ones, so we will round up our number to nearest ten, that will be 190.
As there are 2 ones in number 252, so we will round down our number to nearest 10, that will be 250 hundred.
[tex]\text{Total number of students by rounding each number to the nearest ten}=190+250[/tex]
[tex]\text{Total number of students by rounding each number to the nearest ten}=440[/tex]
Therefore, the estimated number of students, who bough lunch, by rounding each number to the nearest ten will be 440 students.
3. [tex]\text{The actual number of students, who bought lunch}=185+252[/tex]
[tex]\text{The actual number of students, who bought lunch}=437[/tex]
Therefore, the actual number of students, who bought lunch is 437 students.
As 440 is closer to 437, therefore, the rounding the number of students to nearest ten gives a better estimate.
