Lesson 3 – Ninths

Objective:

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

 

Example 2

 

 

1) 5               6) 7
2) 4               7) 20
3) 6               8) 1
4) 3               9) 10
5) 2             10) 8

 

Unit 10 Lesson 3: Exercise 2

Match these; find  of these numbers.

3.  A farmer had 108 sheep. He sold of them. How many sheep were sold?

4.  72 ball were in a packet, of them were green. How many green balls were there?

5.  A shopkeeper counted her canned goods. She found out that   of the cans were dented out of a box of 108. How many dented cans were there?

3) 12

4) 8

5) 12

 

Unit 10 Lesson 3: Exercise 3

Use the fraction wall below to answer the questions.

4) How many Sixths are equal to   ?

5) How many Ninths are equal to   ?

6) How many Sixths are equal to   ?

7) How many Ninths are equal to   ?

Example:

Find  of 21

Solution:

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

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

or 2 x 7 = 14.

Therefore   of 21 = 14.

Example: 1

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 = 10

 

Example 2

( 1/3 of 30)  +  ( 1/6  of 36)

10 + 6 = 16

Example 3

(  2/6 of 18)  +  ( 3/9  of 27)

6 + 9 = 15

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