Explanation:

Answer: (a)  The value of each bead in earth is 1.

Beads above the crossbar are called heaven A Chinese abacus called a suan pan (reckoning board). Illustration by Hans & Cassidy. Courtesy of Gale Group. beads, and beads below are called earth beads. Each heaven bead has a value of five units and each earth bead has a value of one unit. A Chinese suan pan has two heaven and five earth beads, and the Japanese soroban has one heaven and four earth beads.