Fill in the blanks.
Each boy has 7 stickers.
Each girl has 9 stickers.
The ratio of the number of boys to the number of girls is 3 : 11.
- Difference in the number of girls and boys = _____ u
- Total number of boys and girls = _____ u
- Difference in the number of stickers that the boys and the girls have = _____ u
- Total number of stickers that the boys and girls have = _____ u
|
Boys |
Girls |
Number of children |
3 u |
11 u |
Number of stickers for each child |
7 |
9 |
Total number of stickers |
3 u x 7 = 21 u |
11 u x 9 = 99 u |
(a)
Change ratio into units.
Number of boys = 3 u
Number of girls = 11 u
Difference between the number of girls and boys
= 11 u - 3 u
= 8 u
(b)
Total number of boys and girls
= 3 u + 11 u
= 14 u
(c)
Total number of stickers that the boys have
= 3 u x 7
= 21 u
Total number of stickers that the girls have
= 11 u x 9
= 99 u
Difference in the number of stickers that the boys and the girls have
= 99 u - 21 u
= 78 u
(d)
Total number of stickers that the boys and girls
= 21 u + 99 u
= 120 u
Answer(s): (a) 8; (b) 14; (c) 78; (d) 120