Question

Pedro’s book weighs 19/4 pounds. Blanca’s book weighs 17/7 pounds. Use estimation to determine about how much more Pedro’s book weighs than Blanca’s. 1 lb 2 lbs 6 lbs 7 lbs

Answer 1

2lbs

Explanation:

We are given that

Weight of Pedro's book=
`(19)/(4) =4.75 lbs`

Weight of Blanca's book=
`(17)/(7) =2.42 lbs`

We have to determine how much more Pedro's book weight than Blanca's using estimation

Difference between weight of book of Pedro and Blanca

=4.75-2.42

Difference between weight of book of Pedro and Blanca=
`2.3\sim 2 lbs`

Hence, the weight of Pedro's book is 2 lbs more than the weight of Blanca's book.

Answer: 2lbs

Answer 2

Pedro’s book weighs 2 more pounds than Blanca’s

Explanation:

Pedro’s book weighs 19/4 pounds.

Blanca’s book weighs 17/7 pounds.

To find how much more Pedro’s book weighs than Blanca’s

Subtract Blanca's book weight from Pedro's book weight

`(19)/(4) - (17)/(7)`

To subtract fractions , take common denominator

LCD = 4*7 = 28

`(19*7)/(4*7) - (17*4)/(7*4)`

`(133)/(28) - (68)/(28)`

`(65)/(28)`

2.3214

2 lbs

Pedro’s book weighs 2 more pounds than Blanca’s