Look at the following solution to this sig fig problem and tell me what I have done wrong. Then show me the correct and best way to solve this problem.
Note: Use de rule addition/subtraction.
ADDITION/SUBTRACTION: You must show the least degree of precision even if your calculator does not
245.956 g – 245.756 g = 0.2 g according to your calculator. But your degree of precision is the 0.001 g and so your correct answer is 0.200 g
23.789 g + 81.211 g = 105 g according to your calculator. But your degree of precision is the 0.001 g and so your correct answer is 105.000 g
The degree of precision is not necessarily about the number of places behind the decimal point. In these examples consider ambiguous zeros to be non significant
4500 m + 21 m = 4521 m according to your calculator. But your degree of precision is the 100’s place and so your correct answer is 4500 m
90 cm + 45.21 cm = 135.21 cm according to your calculator. But your degree of precision is the 10’s place so your correct answer is 140 cm
The question:
Add the following quantities: 4.05 kg + 567.95 g + 100.1 g
My solution:
4.05 + 567.95 + 100.1 = 672.1
There are several things wrong with my solution. Tell me what they are.
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