Question

Otis plans to make 3 batches of sidewalk chalk How much plaster of paris does he need

Hep me please
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Answer 1

`4(1)/(2)` cups plaster of paris.

Explanation:

Given:

for one batch of sidewalk chalk =
`1(1)/(2)` cup plaster of paris.

Number of bathes = 3

We need to find quantity of plaster of paris.

Solution:

For making 1 batch of sidewalk chalk =
`1(1)/(2)` cup plaster of paris.

For making 3 batches of sidewalk chalk =
`3* 1(1)/(2)` cup plaster of paris.

`= 3* (2* 1+1)/(2)`

`= 3* (2+1)/(2)`

`= 3* (3)/(2)`

`= (3* 3)/(2)`

`= (9)/(2)`

`=4(1)/(2)`

Therefore, he needed
`4(1)/(2)` cups plaster of paris.