One of the oldest devices used for calculation is the abacus

Last updated: 5/22/2023

One of the oldest devices used for calculation is the abacus as shown in the figure Each rod names one of the positions we use in counting Each bead on the bottom represents one unit in tha column and each bead on the top represents 5 units in that column The number illustrated in the figure is 1 734 What number is illustrated by the following drawing