Page 124 - NUMINO Challenge_C2
P. 124
Basic Concepts Overs and Shorts
When you give 2 biscuits to each child at a playground, 5 biscuits are left
over. Therefore, you give 1 more biscuit to each child, but you are short of 1
biscuit this time. Here is how to find the number of children at the playground.
++ ++
The number of children is equal to the sum of the number of biscuits left
over when you give each child 2 biscuits and the number of biscuits that
you are short when you give each child an additional biscuit. Therefore, the
number of children at the park is 5 1 6.
Example The students of 5th grade class sit on the benches in the
auditorium. When 5 students sit on 1 bench, 8 students do not
have a place to sit. When 6 students sit on 1 bench, there are 2
seats lef t. How many children are in the 5th grade class?
Class Notes
When 6 students sit on each bench, more
student(s) can sit per bench.
8 more students are able to sit with 2 seats lef t. 8
students
Therefore, more students are able to sit.
Therefore, there are seats and the 5th grade
class has 5 8 students.
Try It Again When 3 marbles are put in each jar, 5 marbles are lef t. When 4
marbles are put in each jar, the last jar is 2 marbles short. How
many marbles are there in all?
121Communication
When you give 2 biscuits to each child at a playground, 5 biscuits are left
over. Therefore, you give 1 more biscuit to each child, but you are short of 1
biscuit this time. Here is how to find the number of children at the playground.
++ ++
The number of children is equal to the sum of the number of biscuits left
over when you give each child 2 biscuits and the number of biscuits that
you are short when you give each child an additional biscuit. Therefore, the
number of children at the park is 5 1 6.
Example The students of 5th grade class sit on the benches in the
auditorium. When 5 students sit on 1 bench, 8 students do not
have a place to sit. When 6 students sit on 1 bench, there are 2
seats lef t. How many children are in the 5th grade class?
Class Notes
When 6 students sit on each bench, more
student(s) can sit per bench.
8 more students are able to sit with 2 seats lef t. 8
students
Therefore, more students are able to sit.
Therefore, there are seats and the 5th grade
class has 5 8 students.
Try It Again When 3 marbles are put in each jar, 5 marbles are lef t. When 4
marbles are put in each jar, the last jar is 2 marbles short. How
many marbles are there in all?
121Communication
