Need help setting up and finding a solution to this question for my third grader

Question

In Seattle, during February, out of every three days the sun shines one day, it is cloudy one day, and it rains one day. In three weeks, how many rainy days would you have?

Explain your thinking using pictures, words, and numbers.

Answer 1

See the video.

Answer 2

Question: If in 3 days 1 day is rain, then in 3 weeks how many days are rain?

3 weeks equal 3x7 days = 21 days

1 day rain = 3 days total,

Dividing each side by 3

1/3 rainy day = 3/3 = 1 day

Therefore, multiply each side by 21

21/3 rainy days = 21 x 1 days

 7 rainy days in 21 days total

Answer 3

To solve this problem, we can use a ratio to find the number of rainy days in three weeks.

First, we need to find out how many days are in three weeks. Since there are seven days in one week, three weeks would be:

3 weeks x 7 days/week = 21 days

Next, we can use the information in the problem to create a ratio of rainy days to total days:

1 day of rain : 3 total days

We can simplify this ratio by dividing both sides by 3:

1/3 day of rain : 1 total day

Now we can use this simplified ratio to find the number of rainy days in three weeks. We can do this by multiplying the number of total days (21) by the fraction of days that are rainy (1/3):

21 days x (1/3) = 7 days

So, in three weeks, we would expect to have 7 rainy days based on the information in the problem.

To illustrate this visually, we could use a bar model to represent the ratio of rainy days to total days:

sqlCopy code

1 day of rain 1 day of rain 1 day of rain

┌─────────┐ ┌─────────┐ ┌─────────┐

│ 1 │ │ 1 │ │ 1 │

└─────────┘ └─────────┘ └─────────┘

rainy cloudy sunny

1/3 of the time 1/3 of the time 1/3 of the time

In the bar model, we can see that out of every three days, one day is rainy, one day is cloudy, and one day is sunny. We can also see that if we have 21 total days (represented by the three rows of bars), we would expect to have 7 days of rain (represented by the first row of bars).