Carlos counted all of the tickets that were taken at a school carnival. Each time he counted 10 tickets, he placed a tally on the chart below.
Adult 16
Child 18
Which number sentence could be used to find t, the total number of tickets he counted?
A.(16+18)+10=t
B.(16+18)-10=t
C.(16+18)x10=t
D.(16+18)divide 10=t
C?
348 students at Bryant's school ride a bus each morning. There are 5 grade levels at his school, and a fairly equal number of students from each grade level ride the bus. About how many students that ride the bus are fifth graders?
A.280
B.140
C.70
D.40
C?
Ms.Clark wants each of 25 children to get 3 cookies at her daughter's party. How many dozens of cookies should Ms.Clark bake to make sure each child receives 3 cookies?
A.4
B.5
C.6
D.7
D?
I think they're all correct
Ok,Thanks cause I wasn't sure with them
For the first question, Carlos placed a tally on the chart every time he counted 10 tickets. To find the total number of tickets he counted, we need to add the number of times he made a tally and then multiply by 10. In this case, Carlos made 2 tallies (one for adults and one for children). So, we can use the number sentence (16 + 18) x 10 = t. The correct answer is C.
For the second question, there are 348 students who ride the bus and 5 grade levels. To find the approximate number of fifth graders on the bus, we can divide the total number of students by the number of grade levels. So, 348 divided by 5 gives us approximately 69.6. Since it says there is a fairly equal number of students from each grade level, we round 69.6 to the nearest whole number, which is 70. Therefore, the correct answer is C.
For the third question, Ms.Clark wants each child to get 3 cookies and there are 25 children. To find out how many cookies she should bake, we need to divide the total number of cookies by the number of cookies each child receives. So, 25 x 3 = 75. Since cookies are typically baked in dozens, we need to divide 75 by 12 to find how many dozens of cookies to bake. 75 divided by 12 gives us approximately 6.25. Since Ms.Clark wants to make sure each child receives 3 cookies, she should bake at least 7 dozen cookies. Therefore, the correct answer is D.