william 發問時間: 科學數學 · 1 0 年前

p.6 maths question

My sister read 2/7 of a novel yesterday and 3/8 of it today. What fraction of the novel is unread?

A. 1/3

B.2/3

C.19/56

D.37/56

How many common fractors of 48 and 72 are there?

A. 7 B.8 C.9 D.10

Lily woke up and stood beside the bed in the morning. She turned left at a right angle and faced the sun. What direction was she facing when she stood beside the bed?

A. east B. south C. west D. north

1 個解答

評分
  • 1 0 年前
    最佳解答

    1.

    Sol:

    My sister has read (2/7+3/8=)37/56 of the novel for these two days.

    So, she has not read (1-37/56=)19/56 of the novel .

    (C)

    2.

    Sol:

    48:1 ,2 ,3 ,4, 6 ,8 ,12 ,16,24 ,48

    72:1 ,2 ,3 ,4 ,6 ,8 ,9,12 ,18,24 ,36,72

    According to the above, there are 8 common factors of 48 and 72.

    (B)

    3.

    Sol:

    圖片參考:http://imgcld.yimg.com/8/n/AC06501991/o/1510070301...

    According to the picture, south is the durection when she stood beside the bed.

    (B)

    參考資料: me
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