There were some adults and children at a conference.
38 of the people were adults.
34 of the children were boys and the rest were girls. There were 20 girls.
- How many children were there?
- How many more children than adults were at the conference?
Adults |
Children |
Total |
3x4 |
5x4 |
8x4 |
|
Boys |
Girls |
|
|
3x5 |
1x5 |
|
12 u |
15 u |
5 u |
32 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of children
= 20 u
= 20 x 4
= 80
(b)
Number of more children than adults
= 20 u - 12 u
= 8 u
= 8 x 4
= 32
Answer(s): (a) 80; (b) 32