Take the Number Line if you want to understand clearly.NUMBER LINE -In basic mathematics, a number line is a picture of a graduated straight line that serves as abstraction for real numbers, denoted by.Every point of a number line is assumed to correspond to a real number, and every real number to a point.

As 30 number has positive sign , it’s not necessary to show positive sign because if any number is without any sign it means it’s positive.So the answer will be 30–9 =21 it will be positive 21 because when we subtract the number which is larger then answer will be in that sign .As 30 is larger number and it’s positive so the answer will be positive 21.

When one integer is positive n other is negative we must subtract larger no from smaller no n then put sign of larger no ie,30–9=21 And ans is plus 21 as the larger no is positive

It’s a simple subtraction.When we subtract 9 from 30 we get 21 as the result.Don’t get confused by seeing the positive sign with 30.

If you got confused then use a sign which is with the given greatest number .

We can also write +30–9 as 30–9.So, 30–9 is equal to 21.Ans.)

The final answer will be positive 21 as 30 is bigger than 9 and we generally do not use the positive sign before a number .So 9 subtracted from 30 gives us 21

21

when d digit having large value of -….. then subtract and it will take d value of-…….. and same with +ve value…….. so ans.

iz 21….

Solution- +30-9 =21 Because addition subtractation gives subtractation

In this question 30 is a positive integer so on 30–9 = 21

Unless I’m missing something here the answer is 21

30–9=21 HOPE THAT THIS ANSWER IS USEFUL.

Using a calculator from the 90’s, I got 21.

+30–9 is just 30–9.

30–9=21

the answer is 21 (30–9=21)

+30–9 or 30–9=21 SIMPLE

The answer for +30–9 =21

Simple.

30-9=21

30-9=21 answer

The answer is 21

+30-9 =21

Answer is 21

30–9=21

30–9=21

30-9=21

Its 21

its 21

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