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Q.

Taking into account of the significant figures, what is the value of 9.99 m - 0.0099 m?

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a

9.980 m

b

9.9m

c

9.9801m

d

9.98m

answer is A.

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Detailed Solution

detailed_solution_thumbnail

In addition/subtraction, minimum no. of digits after decimal point needs to be considered. Here, from the given data, (9.99 m - 0.0099 m), significant digit after decimal is two. 
9.99 - 0.0099=9.9801
= 9.98 m

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