I have a confusion regarding significant and rounding off data, What would be correct answer of this , if we add them: 5.00 + 0 .775 + 0.0001 = ??? What would be its correct answer??
The correct answer is 5.78
When you add the values 5.7751 is the total. Be sure to line up your decimals!
The first value 5.00 has 3 sig figs, last in the hundredths place.
The second value 0.775 also has 3 sig figs, the last in the thousandths place.
The third value 0.0001 has 1 sig fig but holds the ten thousandths place.
The rule is- circle the last significant digit farthest to the right in each value. Locate the sig fig farthest to the left and draw a line to the right of it. This is the last significant place.
Round to this place. 0.0051 rounds up 0.01, thus bumping 5.77 up to 5.78