Add or subtract the following measurement be sure each answer you enter contains the correct number of significant digits
16.700mL-14.50mL=? ML
2.7mL+6.507mL=?ML
13.97mL+6.7mL=?ML
16.700 mL - 14.50 mL = 2.20 mL
2.7 mL + 6.507 mL = 9.207 mL
13.97 mL + 6.7 mL = 20.7 mL
To add or subtract measurements with significant figures, follow these steps:
1. For addition and subtraction, line up the decimal points of the measurements.
2. Perform the calculation as usual.
3. Round the final answer to the least number of decimal places in the original measurements.
Using these steps, let's solve each problem:
1. 16.700 mL - 14.50 mL = 2.200 mL
Since 16.700 and 14.50 have different decimal places, the answer should only have one decimal place. Therefore, we round the answer to 2.2 mL.
2. 2.7 mL + 6.507 mL = 9.207 mL
The original measurements have three decimal places, so the answer should also have three decimal places. Therefore, the answer is 9.207 mL.
3. 13.97 mL + 6.7 mL = 20.67 mL
The original measurements have two decimal places, so the answer should also have two decimal places. Therefore, the answer is 20.67 mL.
To summarize:
16.700 mL - 14.50 mL = 2.2 mL
2.7 mL + 6.507 mL = 9.207 mL
13.97 mL + 6.7 mL = 20.67 mL