Add or subtract the following measurements. Be sure each answer you enter contains the correct number of significant digits.
11.60g-1.2g= ___g
8.80g-1.170g=___g
4.0g+1.40g=____g
11.60g - 1.2g = 10.4g
8.80g - 1.170g = 7.63g
4.0g + 1.40g = 5.4g
To add or subtract measurements and ensure the correct number of significant digits, follow these steps:
1. For addition and subtraction, line up the decimal points of the measurements.
2. If necessary, adjust the number of decimal places so that both measurements have the same amount of decimal places.
Now let's solve the equations:
11.60g - 1.2g = ___g
Since both numbers have one decimal place, no adjustment is needed.
11.60g - 1.2g = 10.4g
Answer: 10.4g
8.80g - 1.170g = ___g
Since 8.80 has two decimal places and 1.170 has three decimal places, we need to adjust the measurements.
8.80g becomes 8.800g (added one zero at the end).
8.800g - 1.170g = 7.630g
Answer: 7.630g
4.0g + 1.40g = ____g
Since 4.0 has one decimal place and 1.40 has two decimal places, we need to adjust the measurements.
4.0g becomes 4.00g (added one zero at the end).
4.00g + 1.40g = 5.40g
Answer: 5.40g