Question

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

1) 9.9m
2) 9.9801m
3) 9.98m
4) 9.980​

Answer 1

Answer:

2) 9.9801m

Explanation:

9.99m - 0.0099m = 9.9801m

By the rule of significant figures, the highest decimal point must be taken in subtraction and addition.

Here we have 0.0099 as the highest decimal point. That is, point after 4 numbers.

Therefore our answer must have point after 4 numbers.

Hence option 2) is correct.

Answer 2

Answer:

2

Explanation:

While performing addition or subtraction we have to assign the no.of significant figures in the answer based on the least no.of decimal digits in one of the measurement. Here 9.99 has the least no.of decimal digits, thus we should round off the answer to 2 decimal digits.

so answer is 9.98m