Sarin and the million numbers part 5(Math Question)

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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

 

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