Question

rules for adding and subtracting: the answer has the same number of decimal places as the quantity with the fewest decimal places
example: 6.043 mm + 9.1 mm = 15.143 mm = 15.1 mm (round to tenths place)

1. 704.09 g + 8.0320000 g =
2. 5.3025 ml + 1.0 ml =
3. 9.70 kg - 3.541 kg =
4. 7.801 mm + 231.6 mm =

Explanation:

Step1: Add the numbers and round according to the rule

For \(704.09\ g+8.0320000\ g\), add them: \(704.09 + 8.0320000=712.122\ g\). The number with the fewest decimal - places is \(704.09\) (two decimal places), so the answer is \(712.12\ g\).

Step2: Add the numbers and round according to the rule

For \(5.3025\ mL + 1.0\ mL\), add them: \(5.3025+1.0 = 6.3025\ mL\). The number with the fewest decimal - places is \(1.0\) (one decimal place), so the answer is \(6.3\ mL\).

Step3: Subtract the numbers and round according to the rule

For \(9.70\ kg−3.541\ kg\), subtract them: \(9.70 - 3.541=6.159\ kg\). The number with the fewest decimal - places is \(9.70\) (two decimal places), so the answer is \(6.16\ kg\).

Step4: Add the numbers and round according to the rule

For \(7.801\ mm+231.6\ mm\), add them: \(7.801 + 231.6=239.401\ mm\). The number with the fewest decimal - places is \(231.6\) (one decimal place), so the answer is \(239.4\ mm\).

Answer:

1. \(712.12\ g\)
2. \(6.3\ mL\)
3. \(6.16\ kg\)
4. \(239.4\ mm\)