A baby gains 11 pounds in its first year of life. The baby gained 4 1/4 pounds during the first four months and 3 1/2pounds in i
ts second four months. How much did the baby gain in the last four months?
2 answers:
Amount of weight gain in first year = 11 pounds
A year can be divided into three parts consisting of four months each.
According to the question;
The baby gained 4 1/4 pounds during the first four months and 3 1/2pounds in its second four months.
Let weight gained in third 4 month be 'x' pounds.
So;
=> Weight gained in first year = Weight gained in first 4 months + Weight gained in second 4 months + Weight gained in third 4 months
=> 11 pounds = 4.25 pounds + 3.5 pounds + x pounds.
=> x pounds = 11 pounds - 7.75 pounds
=> x pounds = 3.25 pounds
Therefore, the baby gain 3.25 pounds in the last four months.
The baby gains 3.25lbs in the last 4 months.
This problem can be solved by simple subtraction. Take the total amount and subtract the 4 month increments in order to find the find 4 months.
Total = 1st 4 months + 2nd 4 months + 3rd 4 months
11 = 4.25 + 3.5 + 3rd 4 months
11 = 7.75 + 3rd 4 months
3.25 = 3rd 4 months
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