Question

What is the value of 600 m + 600 mm with regard to significant figures

Answer 1

1 m = 1000 mm
600 m = 600 × 1000
600 m + 600 mm = 600 × 1000 + 600
= 600000 + 600
= 600600 mm

Answer 2

Concept:

Significant figures are the number of digits in a value, that contributes to the degree of accuracy of the value.

Given:

The two quantities are 600 m + 600 mm.

Find:

The value of 600 m + 600 mm.

Solution:

In addition or subtraction of the significant figures, the final result should retain as many decimal places as are there in the number with the least decimal places.

600 mm can be written as 0.600 m.

Adding 600 m + 0.600 m,

600 m + 0.600 m = 600.600m

In the given numbers, the decimal place in the number 600 is 0, which is the least. So, we write the final number with zero decimal places.

So, 600 m + 0.600 m = 601 m

Hence, the value of 600 m + 600 mm with regard to significant figures is 601.

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