You can't because math is a subject involving erasing LOTS of it, even if you use erasable pen its considered better to use a pencil..... :)
A book, a pencil, a pen, and mostly, a brain.
A pen for an animal enclosure could have a mass of 32 kg but a pen with which to write, no.
Pen and paper.
12. but if you cant answer that your self, you apparently cant do your math!
by pencil or pen
you put your pen to your paper and write troll
you cant write under water
Where you write with a pen.
a space pen
Well the ink comes out of the pen and that goes on the paper and if you are not an idiot you can write words.
I don't see why you would not be able to write with a pen in space. Pens operate on the principle of capillary attraction, and that is not affected by gravity or the absence of gravity. The only issue I can see is that if you attempt to use a pen in a vacuum, any air bubbles contained in the ink would expand, and the heat of your hand might make the ink boil.
to write
with a pen
You CAN write in space. With a chalkboard and eraser or with pencil and paper. The problem is that in the vacuum of space, the liquid ink of a pen evaporates too quickly and dries out the pen. Additionally, within the pressurized crew compartment of a spacecraft, there is no gravity that is needed to cause the ink to "fall down" onto the ball of a ballpoint pen. To solve this problem, NASA solicited the design of a special ballpoint pen that could write in zero-G or upside down. The result was a pen with an ink cartridge pressurized with nitrogen, which would force the ink to the ballpoint even when inverted.
the verb (action) is write
The opposite end to where the pen would write
What do you call a pen with five fingers? Write-handed.