數學題(長答)(20分)

1. At 1 p.m., the temperature in a certain place was 5℃. From that time

onwards, the temperature change in each hour compared with the last

hour was recorded. The results were: +3, +2, 0, -1, -2, -3, -3, -5

( a ) What was the temperature at 5 p.m.?

( b ) What was the highest temperature between 1 p.m. and 9 p.m.?

( c ) What was the lowest temperature between 1p.m. and 9p.m. ?

Sol:

1 p.m. ~ 5℃

2 p.m. ~ 8℃ (+3)

3 p.m. ~ 10℃ (+2)

4 p.m. ~ 10℃ (0)

5 p.m. ~ 9℃ (-1)

6 p.m. ~ 7℃ (-2)

7 p.m. ~ 4℃ (-3)

8 p.m. ~ 1℃ (-3)

9 p.m. ~ - 4℃ (-5)

Ans: ( a ) 9℃ ( b ) 10℃ ( c ) – 4℃

a. 9℃
b. 10℃
c. 1℃