CHO CA-222 Chapter 9 . Algebra CLASS ACTIVITY 9-L X SECTION 9.4 Solving Word Problems with Strip Diagrams and with Equa CCSS CCSS SMP1, SMP2, 4.0A.3, 5.NF.2, 5.NF.6, 6.EE.6, 6. EE.7, 7. NS.3, 7. EE.3, 7.EE.4 The problems in this activity were inspired by problems in the mathematics textbooks used in Singapore in grades 4-6 (see [SMEOO] and [SMEw00], volumes 4A-6B). 1. At a store, a hat costs 3 times as much as a T-shirt. Together, the hat and T-shirt cost $35. How much does the T-shirt cost? Solve this problem in two ways: by using the strip diagram shown here and with alge- braic equations. Explain both solution methods, and discuss how they are related. Hat $35 T-shirt . There are 180 blankets at a shelter. The blankets are divided into two groups. There are 30 more blankets in the first group than in the second group. How many blankets are in the second group? Solve this problem in two ways: by using the strip diagram shown here and with alge- braic equations. Explain both solution methods, and discuss how they are related. 30 Group 1 180 Group 2 3. On a farm, - of the sheep are gray, , of the sheep are black, and the rest of the sheep are white. There are 36 white sheep. How many sheep in all are on the farm? Solve this problem in two ways: by using the strip diagram shown here and with alge- braic equations. Explain both solution methods, and discuss how they are related. Gray Black sheep sheep 36 white sheep