One of the oldest devices used for calculation is the abacus, as shown in Figure 4.2. Each rod names one of the positions we use in counting. Each bead on the bottom of the central bar represents one unit in that column and each bead on the top represents 5 units in that column. The number illustrated in Figure 4.2 is 1,734. What number is illustrated by the drawings in Problems 43–48?

Figure 4.2

Transcribed Image Text:

I! 8888. LI