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Question 85

If x = 110 and y = 38, then evaluate x+y, xy, x×y and x÷y.


Solution

Given, x=110 and y=38
Now, x+y=110+(3)8=11038=1×410×43×58×5=4401540=41540=1140
And xy=110(38)=110+38=1×410×4+3×58×5=440+1540=4+1540=1940
Product of rational number =Product of numeratorProduct of denominators=x×y=110×(3)8=1×(3)10×8=380
And x÷y=110÷(38)
The reciprocal of (38)=83.
 So, x÷y=110×83=1×810×3=830=8÷230÷2=415

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