There were some adults and children at a party.
38 of the people were adults.
23 of the children were girls and the rest were boys. There were 10 boys.
- How many children were there?
- How many more children than adults were at the party?
Adults |
Children |
Total |
3x3 |
5x3 |
8x3 |
|
Girls |
Boys |
|
|
2x5 |
1x5 |
|
9 u |
10 u |
5 u |
24 u |
(a)
The number of children is the combined repeated identity.
Number of boys = 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Number of children
= 15 u
= 15 x 2
= 30
(b)
Number of more children than adults
= 15 u - 9 u
= 6 u
= 6 x 2
= 12
Answer(s): (a) 30; (b) 12