When adding values, the rules for the significant figures say that your answer should have as much decimal digits as the number with the least digits after the comma. In this case, 0 as ā8 gā has no decimals. For a multiplication you should look at significant numbers. If you would multiply these values, the answer would only be allowed to have 1 digit multiplied by a power of 10. The answer for this question is therefore 113 g as you follow the rules for addition (decimals).
