An eraser
if this is a serious question then this is a possible answer ml is millilitre (volume) mg is milligram ( weight ) so a ml of something might be more than a mg less than a mg or equal to a mg you can only compare them if you use a specific substance
Any metric unit would do. But it might be easier to pick something smaller than the length of the pencil, like a centimeter, or a millimeter.
Use the division algorithm. If b = pa + r, then gcd(b,a) = gcd(a,r). Then you can apply the division algorithm again with a = qr + r' and gcd(a,r) = gcd(r, r'). Note that each time the square norm of the remainder gets smaller and smaller, so eventually this process will terminate and you can get the answer. Here, it should be 1.
you use it when you laern something.................
An eraser
soap
Soap Pencil Toothpaste Eraser Ice Candle
soap, pencil, eraser
Soap.
A bar of soap. It gets smaller with each use as it wears down from being used to wash.
a pencil, and an eraser
Soap
water
To make smaller or use less of something
It appears there may be a typo in your question. If you meant to ask about "reduce," it means to make something smaller in size, amount, or degree. It can also refer to simplifying something or making it more manageable.
If something is more than 100cm, it's easier to stick to the larger unit so that it seems smaller and more manageable.