F.1數學 20點急急急急急要的!!

5)the number of salmon sushi : the number
of California rolls=12:20

=3:5



6a) the number of students wearing glasses:
the whole class=20:42

=10:21



6b) the number of students without wearing glasses: the whole class=21-10:21

=11:21



6c)the number of students wearing glasses: the
number of students without wearing glasses=10:11



7) Her daughter get candies=28x4/7=16

Her son get candies=28x3/7=12



11a) 4 : 8 : 12

=1:2:3



11b) 14 : 7 : 42

=2:1:6



11c) 18 : 30:12

=3:5:2

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5) There are 12 pieces of salmon sushi and 20 pieces of California rolls in a package . Find the ratio of the number of salmon sushi to that of California rolls .
The ratio.
=12:20
=3:5

6) there are 42 students in S1B where 20 of them wear glasses .
6a) Find the ration of the number of students wearing glasses to that of the whole class .
The ratio.
=20:42
=10:21

6b) Find the ration of the number of students without wearing glasses to that of the whole class .
The ratio.
=22:42
=11:21

6c) Find the ratio of the number of students wearing glasses to those without wearing them .
The ratio.
=20:22
=10:11

7) Mother divides 28 candies in the ratio of 4 : 3 and gives them to her daughter and son respectively . How many candies does each of her daughter and son get ?
Her daughterget.
=28x4/7
=16
Her son get.
=28x3/7
=12

11) Simplify the following ratios .
11a) 4 : 8 : 12
1:2:3
11b) 14 : 7 : 42
2:1:6
11c) 18 : 30:12
3:5:2

有12件和20件三文魚壽司，加州卷在一包。查找比對鮭魚的數量壽司，加州卷。

6）有42名學生中有20 S1B其中戴眼鏡。

6a中）找到配給的數量戴眼鏡的學生，給該全班。
6b中）找到配給的數量不戴眼鏡的學生，給該全班。
6C條）找到比，戴眼鏡的學生人數為那些無穿它們。

7）母親的糖果分28比4：3，使他們對她的女兒和兒子分別。沒有多少糖果每得到她的女兒和兒子？

11）簡化比率如下。
第11A條）4：8：12
11B款）14：7：42
11攝氏度）18：30:12

5) 3:5
6a)10:21
6b)11:21
6c)10:11
7)The daughter gets 16 candies
The son gets 12 candies
11a)1:2:3
11b)2:1:6
11c)3:5:2