Class 06 Napier's Rods for Multiplication

 PROJECT – NAPIER’S ROD

Topic: 

Napier's Rods for Multiplication.

Objective:

 To construct and demonstrate the use of a set Napier's rods 

Materials Required: 

Chart paper, geometry box, sketch pens of, a pair of scissors., fevicol, etc.

Procedure 

Step 1: Make all the strips shown in Fig. 1 on chart paper and cut. These strips are called Napier's Rods.

 (A) To multiply  a 2-digit number by a single-digit. 

Example: 36 x 5

PROJECT – NAPIER’S ROD

Step 2.: 

To multiply 36 x 5, keep the 3-strip and 6-strip 

next to the x-strip as shown in Fig.

To find the product, add the numbers diagonally.  

Hence, 36 x 5 = 180. 

PROJECT – NAPIER’S ROD

(B) To multiply a 3 -digit  number by a single-digit.

Example : 539  X 8.

Step 3 To  multiply 539 x 8, Keep 5-strip, 3-strip and 9-strip next to X-strip as shown in Fig

 

Add the numbers diagonally to get the product. 

Hence, 539 x 8 = 4312