Fill in the blanks.
The number of girls is 20 more than the boys.
The number of adults is twice the number of children.
Let the number of boys be 1 u.
- Number of girls = 1 u + _____
- Number of children = 2 u + _____
- Number of adults = _____ u + 40
- Number of people = _____ u + 60
(a)
Change X times and more than or less than into units.
The number of girls is 20 more than the boys.
Number of boys = 1 u
Number of girls = 1 u + 20
(b)
Number of children
= 1 u + 1 u + 20
= 2 u + 20
(c)
The number of adults is twice the number of children.
Number of adults
= 2 x (2 u + 20)
= 4 u + 40
(d)
Total number of people
= (2 u + 20) + (4 u + 40)
= 2 u + 4 u + 20 + 40
= 6 u + 60
Answer(s): (a) 20; (b) 20; (c) 4; (d) 6