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ICSE Class 7 Answered

(-23)+57x50\(-54)-90 Sir, you have given solution to above problem yesterday. But, in first step , why    ---- + 57 x 50/ -54---- = ---  + 2850--- it may be  - 2850, as per rule  -  and +  multiply give  - sign. Sir, elaborate the solution.  
Asked by jihanpatel9159.7sdatl | 08 May, 2020, 10:32: AM
answered-by-expert Expert Answer
Here, you are multiplying 57 and 50, since both are positive → the product is also positive.
 
In your way the other solution can be:
 
 
 
begin mathsize 16px style left parenthesis negative 23 right parenthesis space plus space 57 space cross times fraction numerator 50 over denominator negative 54 end fraction minus 90 equals space minus 23 space minus space 2850 over 54 minus space 90 equals fraction numerator negative 23 left parenthesis 54 right parenthesis space minus space 2850 space minus space 90 left parenthesis 54 right parenthesis over denominator 54 end fraction equals space fraction numerator negative 8952 over denominator 54 end fraction equals space fraction numerator negative 1492 over denominator 9 end fraction end style
 
Hope, your doubt is clear.
Answered by Yasmeen Khan | 08 May, 2020, 08:51: PM

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