Ashoper buys 3 items for $2.99, $4.79 and 3.87 estimate the total

to estimate round the 3 values to the nearest dollar

2.99 = 3

4.79 = 5

3.87 = 4

3 + 5 +4 = 12

 estimated total would be approximately $12

 real total = 2.99 + 4.79 +3.87 = 11.65 ( not far off of the estimated value)

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step-by-step explanation:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.