Fill in the blanks.
For (a) to (c), give the answers in units (Eg 1 u) or unit equations (Eg 1 u + 2).
For (d), give the answer in numbers. (Eg 1)
80 children are in a school.
There are 70 more boys than girls.
Let the smaller group be 1 u.
- Number of girls = _____
- Number of boys = _____
- Total number of children = _____
- 1 u = _____
(a)
Choose the smaller group be 1 u.
There are 70 more boys than girls.
The number of girls is the smaller group.
Number of girls = 1 u
(b)
Number of boys = 1 u + 70
(c)
Total number of children
= 1 u + 1 u + 70
= 2 u + 70
(d)
Total number of children = 80
2 u + 70 = 80
2 u = 80 - 70
2 u = 10
1 u = 10 ÷ 2 = 5
Answer(s): (a) 1u; (b) 1u + 70; (c) 2u + 70; (d) 5