Read posting **Sarin and the million numbers** and **Hairu and the numbers **to understand the mathematics concept of numbers.

Read also posting on **Sarin learns concept of ratio in school** and **Sarin learns the concept of Fraction (mathematics concept)** to understand Ratio and Fraction.

Upper primary school mathematics question UPQ19

UPQ19-1. *The population of Town Z is 574 603. Round off this figure*

* to the nearest **hundred.*

UPQ19-2. *How many fifteenths are there in the sum of the fractions?*

*1/5 + 2/5 + 4/15*

UPQ19-3.** ***___ : **21 = 4 : 3. What is the missing number on the line?*

UPQ19-4. *Arrange the following in ascending order.*

* 3/4, 6/7, 5/14*

Solution:

UPQ19-1. *The population of Town Z is 574 603. Round off this figure*

* to the nearest **hundred.** *

Round off give 574 600

UPQ19-2.* How many fifteenths are there in the sum of the fractions?*

*1/5 + 2/5 + 4/15*

1/5 + 2/5 + 4/15

= 3/15 + 6/15 + 4/15

= 13/15

So, there are 13 fifteenths there

UPQ19-3. ** ***___ : **21 = 4 : 3. What is the missing number on the line?*

21 ÷ 3 = 7

4 × 7 = 28

Therefore,

28 : 21 = 4 : 3

UPQ19-4. *Arrange the following in ascending order.*

* 3/4, 6/7, 5/14*

3/4 = 21/28,

6/7 = 24/28,

5/14 = 10/28

* Number in ascending order is 5/14, 3/4, 6/7*