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CBSE Class 7 Answered

1.what should be added to 7/15 to get (-3/8) ?
 
 
 
2.what is the value of (a) [{(0.0369/0.03)/0.01}*10]
Asked by omsingh | 01 Jun, 2015, 07:09: PM
answered-by-expert Expert Answer
begin mathsize 16px style left parenthesis 1 right parenthesis space L e t space x space b e space a d d e d space t o space 7 over 15 space t o space g e t space minus 3 over 8. T h e n comma space w e space h a v e x plus 7 over 15 equals negative 3 over 8 x equals negative 3 over 8 minus 7 over 15 x equals fraction numerator negative 45 minus 56 over denominator 120 end fraction x equals fraction numerator negative 101 over denominator 120 end fraction end style
 
 
begin mathsize 16px style left parenthesis 2 right parenthesis space space open square brackets open curly brackets fraction numerator open parentheses begin display style fraction numerator 0.0369 over denominator 0.03 end fraction end style close parentheses over denominator 0.01 end fraction close curly brackets close square brackets cross times 10 equals open square brackets open curly brackets fraction numerator 0.0369 over denominator 0.03 cross times 0.01 end fraction close curly brackets close square brackets cross times 10 equals open square brackets fraction numerator 0.0369 over denominator 0.0003 end fraction close square brackets cross times 10 equals 369 over 3 cross times 10 equals 123 cross times 10 equals 1230 end style
 
Please post one question at a time.
Answered by Rashmi Khot | 02 Jun, 2015, 10:02: AM

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