Fill in the blanks.
The number of boys is 20 less than the number of girls.
The number of adults is thrice the number of boys.
Let the number of boys be 1 u.
- Number of girls = 1 u + _____
- Number of children = 2 u + _____
- Number of adults = _____ u
- Number of people = _____ u + 20
(a)
Change X times and more than or less than into units.
Number of boys = 1 u
The number of girls is 20 more than the number of boys.
Number of girls = 1 u + 20
(b)
Number of children
= 1 u + 1 u + 20
= 2 u + 20
(c)
The number of adults is thrice the number of boys.
Number of adults
= 3 x 1 u
= 3 u
(d)
Total number of people
= 2 u + 20 + 3 u
= 2 u + 3 u + 20
= 5 u + 20
Answer(s): (a) 20; (b) 20; (c) 3 ; (d) 5