The phrase "added the same amount" is correct and usable in written English.
It can be used when discussing a situation where a specific quantity is being added equally to different items or values.
Example: "In the experiment, we added the same amount of water to each container to ensure consistency in our results."
Alternatives: "added an equal quantity" or "added a uniform amount".
Kino poured some White Label into a glass, added the same amount of water and two small, nicely formed ice cubes.
Vehicle control was added the same amount of inhibitor solvent while blank control was added nothing but culture medium.
In our Monte Carlo simulations for a given SNR, we added the same amount of noise to the time-activity curves with different values of the trapping component.
The DeCaros say that they deposited the returned money into a savings account and have added the same amount every month since, setting these funds aside as demonstration of their desire not to freeload but to rent or purchase their home under terms they can afford.
Then, we removed the supernatant liquid from the suspension and added the same amount of PBS to the suspension.
For control experiments we added the same amount of HFIP used for the Aβ (1-40) experimentothethe ACSF and removed it by gasification.
Add the same amount of water, cover with foil and turn the oven down to 150ºC/Gas 2 for 1 hour.
Iran is expected to add the same amount again within six months, bringing its crude exports back to pre-sanctions level.
The other needs a little more advance preparation – I tip a couple of tablespoons of the beef fat from the joint into a small pan, heat, and then add the same amount of flour and continue stirring and cooking for two or three minutes, until it has just started to colour.
People who cut $50 from their monthly expenses -- by switching to a less expensive Internet service, say, or quitting a gym they never use -- are adding the same amount to their after-tax income as the interest on a $100,000 money market fund might.
