Fill in the blanks.
The number of boys is 20 more than the girls.
The number of adults is seven times the number of children.
Let the number of girls be 1 u.
- Number of boys = 1 u + _____
- Number of children = 2 u + _____
- Number of adults = _____ u + 140
- Number of people = _____ u + 160
(a)
Change X times and more than or less than into units.
The number of boys is 20 more than the girls.
Number of girls = 1 u
Number of boys = 1 u + 20
(b)
Number of children
= 1 u + 1 u + 20
= 2 u + 20
(c)
The number of adults is seven times the number of children.
Number of adults
= 7 x (2 u + 20)
= 14 u + 140
(d)
Total number of people
= (2 u + 20) + (14 u + 140)
= 2 u + 14 u + 20 + 140
= 16 u + 160
Answer(s): (a) 20; (b) 20; (c) 14; (d) 16