Jillian is knitting a scarf for her sister. She knits 3.5 centimeters of scarf every day. Let's break this down. To find the length of the scarf after 4 days, you can add the number of centimeters for each day. You can think about this as 4 groups of 3.5 cm. Try again. How long will the scarf be after 4 days? Number of daysLength of the scarf (cm) 4 6 Keep going. To find the length of the scarf after 6 days, you can add the number of centimeters for each day. In other words, you can think about this as 6 groups of 3.5 cm. Try again. How long will the scarf be after 6 days?