Lesson 3 – Ninths

Objective:

• At the end of this lesson students should be able to share items into ninths.

Example 2

Example 3

Find  2/3 of 21

Solution:

First find 1/3 of 21, which is 21 ÷ 3 = 7

To get 2/3 of 21, we can get twice the   i.e 7 +7= 14

or 2 x 7 = 14.

Therefore 2/3 of 21 = 14.

Example: 4

Solve ( 1/3 of 15) + ( 1/3  of 30)

Solution

To solve this, we need to solve each set of questions separately before solving them together.

(1/3  of 15)  + ( 1/6  of 30)

1/3 of 15 = 5   ,     1/6  of 30 = 5

5 + 5 = 1

Example 5

( 1/3 of 30)  +  ( 1/6  of 36)

10 + 6 = 16

Example 6

(  2/6 of 18)  +  ( 3/9  of 27)

6 + 9 = 15