Question

Sheila was making place-value disks. She colored 2/6 of the disks red. She colored 1/4 of the disks yellow. If she colored 40 red place value disks, how many disks did she color yellow? How many disks does she still have left to color?

Answer 1

Answer:

She colored 30 yellow place value disks and 50 disks are left to color.

Step-by-step explanation:

Let total number of disks be x.

It is given that, she colored 2/6 of the disks red. She colored 1/4 of the disks yellow.

$\text{Red disks}=\dfrac{2}{6}x$

$\text{Yellow disks}=\dfrac{1}{4}x$

She colored 40 red place value disks.

$\dfrac{2}{6}x=40$

$\dfrac{1}{3}x=40$

$x=120$

It means total number of disks is 120.

$\text{Yellow disks}=\dfrac{1}{4}x=\dfrac{1}{4}(120)=30$

So, she colored 30 yellow place value disks.

Remaining disks = Total disks - Red disks - Yellow disks

               $=120-30-40$

               $=50$

Therefore, 50 disks are left to color.