This Application Problem is a part of the Lesson 2, Unit 4, Grade 1. Ted has 4 boxes with 10 pencils in each box. How many pencils does he have altogether? This problem applies the Concept Development from Lesson 1 of counting by tens. As students depict this problem with a drawing, circulate and notice students who are counting all, counting on, or counting by tens. During the Debrief, students represent the number 40 using a place value chart.