5 km in 2 weeks EXERCISE 4 P. 51 1.Solution: 2' 3, 39 'B 을 - 24 Answer: 12 m cord used 2. Solution: 15$ +43)-74: (¢ **) - * 뜰 47039. / 1 of the mixture is left Solution: (+16)-3(*) Answer: 3 :( a 1½ + 3/2) - 2 을 - 2 20-15 8 nswer: Solution:​