It's the same vallue. If they were different, i could argue that 2.000 is greater than 2.00. Impossible, because 2 is equal to 2.
First divide 3.5 by 2 which equals 1.75. Then do 1.75*3 which equals 5.25. So he drinks 5.25 liters in one hour.
You subtract because it's just adding a negative which cancels out the adding and makes it a subtraction problem.
<span>The expansion of the warehouse will not affect the dimensions of the surrounding fence.</span>