Page 118 - NUMINO Challenge_D2
P. 118
Problem solving Key Points
1 If 6 people work together from the beginning to Let 1 represent the
the end, it will take 18 days to finish road amount of work that
construction. 6 people work together for the first one person does.
4 days, and then 3 people work to finish the Then the total
remaining part. Find the number of days that only amount of work is
3 people work together. Note that each person 108.
finishes the same amount of work in a day.
2 It takes 3 days for boys and 5 days for girls to Let 1 represent the
paint the fence. If 3 boys and 3 girls paint
together to finish the work, which can be finished total amount of
in 5 days by 6 boys, how many days will it take
them to finish the work? work. The amount of
work that a boy can
finish in a day is 1 ,
3
and the amount of
work that a girl can
finish in a day is 1 .
5
115Communication
1 If 6 people work together from the beginning to Let 1 represent the
the end, it will take 18 days to finish road amount of work that
construction. 6 people work together for the first one person does.
4 days, and then 3 people work to finish the Then the total
remaining part. Find the number of days that only amount of work is
3 people work together. Note that each person 108.
finishes the same amount of work in a day.
2 It takes 3 days for boys and 5 days for girls to Let 1 represent the
paint the fence. If 3 boys and 3 girls paint
together to finish the work, which can be finished total amount of
in 5 days by 6 boys, how many days will it take
them to finish the work? work. The amount of
work that a boy can
finish in a day is 1 ,
3
and the amount of
work that a girl can
finish in a day is 1 .
5
115Communication
