Question

Nari says, "The sum of 10 and one-third of a number is 25." She uses the bar model to write an equation to represent her

statement.
25
10
Which equation can Nari write using the bar model?
© 25 – 10+ jn
10-3n+25
25 = 10-3n
10-10-25

Answer 1

A

Explanation:

Answer 2

`25=10+(1)/(3)n`.

Explanation:

It is given that the sum of 10 and one-third of a number is 25.

Let as consider n be the unknown number.

One-third of a number
`=(1)/(3)n`

Sum of 10 and one-third of a number
`=10+(1)/(3)n`

The sum of 10 and one-third of a number is 25. It can be written as

`25=10+(1)/(3)n`

Therefore, the required equation is
`25=10+(1)/(3)n`.