Add or subtract the following measurement be sure each answer you enter contains the correct number of significant digits
9.52g-0.700g=?g
7.600g-0.87g=?g
18.70g+1.020g=?g
9.52g - 0.700g = 8.82g
(Sig figs: 3)
7.600g - 0.87g = 6.73g
(Sig figs: 3)
18.70g + 1.020g = 19.72g
(Sig figs: 4)
To add or subtract measurements with the correct number of significant digits, follow these steps:
1. For addition or subtraction, keep the same number of decimal places as the measurement with the fewest decimal places.
Now, let's calculate the answers:
1. 9.52 g - 0.700 g:
- Since 0.700 g has the fewest decimal places (3), we keep the answer with 3 decimal places.
- Subtracting, we have 9.52 g - 0.700 g = 8.82 g.
2. 7.600 g - 0.87 g:
- Again, 0.87 g has the fewest decimal places (2), so we keep the answer with 2 decimal places.
- Subtracting, we have 7.600 g - 0.87 g = 6.73 g.
3. 18.70 g + 1.020 g:
- In this case, since addition is involved, we will look at the number of significant figures rather than the decimal places.
- Both measurements have four significant figures, so we keep the answer with four significant figures.
- Adding, we have 18.70 g + 1.020 g = 19.72 g.
So the answers, with the correct number of significant digits, are:
- 9.52 g - 0.700 g = 8.82 g
- 7.600 g - 0.87 g = 6.73 g
- 18.70 g + 1.020 g = 19.72 g