Question

explain how comparing 645 and 738 is different from comparing 645 and 649

Answer 1

When comparing these two different sets of numbers the major difference is the number of places that you need to compare. In the case of the first pair, you would have to include the ones, tens and hundreds place when comparing, whereas with the second pair you would only need to compare the ones place. 

This can be seen by using subtraction. You'll note that subtracting the first set gives you a 2 digit number and involves the process of borrowing (when you do it by hand). 

738 - 645 = 93

The second set will give you a one digit number and involves no borrowing. 

649 - 645 = 4

Answer 2

Comparing 645 and 738 is different from comparing 645 and 649 through the following ways:

•In the first set the number 645 begins with 6, follower by 4 and the 5 while 738 begins with 7 followed by 3 and then 8

• In the second set the 645 begins with 6, followed by 4 and then 5 while  the number 649 also begins with 6 and also followed by 4 and then 9

•Lastly the first set  

738-645=93

Second set

649-645=4

Based on the above we can see that the first set which Difference is 93 is greater that the second set which Difference is 4

Inconclusion Comparing 645 and 738 is different from comparing 645 and 649.

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