You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Roden went to a pet shop . He bought 15 gold fish and 7 blue fish . How many fish did he buy ?
22

Zach scored 42 points in the football game . Ben scored 21 points . How many more points did Zach score ?
21

Irwin 's family went on a camping trip in the mountains . On the first day , they hiked from their car to the campsite . First , they hiked 0.2 mile from the car to a stream , and 0.4 mile from the stream to a meadow . Then they hiked 0.1 mile from the meadow to the campsite . How many miles did Irwin 's family hike in all ?

0.7

