Fill in the blanks.
The number of boys is 9 less than the number of girls.
The number of adults is twice 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 + 9
(a)
Change X times and more than or less than into units.
Number of boys = 1 u
The number of girls is 9 more than the number of boys.
Number of girls = 1 u + 9
(b)
Number of children
= 1 u + 1 u + 9
= 2 u + 9
(c)
The number of adults is twice the number of boys.
Number of adults
= 2 x 1 u
= 2 u
(d)
Total number of people
= 2 u + 9 + 2 u
= 2 u + 2 u + 9
= 4 u + 9
Answer(s): (a) 9; (b) 9; (c) 2 ; (d) 4