It is 2.25
3/4 minus 2.5 is -1.75 or -1 3/4
By repeated subtraction. For example 21 divided by 2 : you can take away 2 ten times and you are left with a half of two, so answer ten and a half. They probably assembled tables of divisions.
one take away one tenth = nine tenths
Imagine you are subtracting in real life. If you have eight apples, but then you eat three of them, you only have five left. Therefore, 8 - 3 = 5. However, if you have three apples, and take away eight, you have -5 apples. Which is impossible.
If you have 50% you take the percent sign away so then it is 50. notice there is a decimal point after that you move the decimal two spaces to the right so its .5 or one half
it is just one quarter
A quarter moon. What we call "full" moon is really only half of the moon shining, so if you take away half of a half, you get a quarter. When people say, "It's a quarter moon," there should only be half of a "full" moon showing.
Three eights. There are four eights in one half.
do you own a calculator? so 1.5 is half of 3, so you multiply 3 by two, and take away half of three: 4.5
Twelve. Remember that the dot always adds one half of the original note to the total - so a dotted half note is three beats in length. (Cut a half note in half and you get a quarter, so a dotted half note is two beats for the half note and one beat for the quarter you added to it) So now you can take those three beats (Three quarter notes) and cut them in half, which is six eighth notes, and then cut that in half and get twelve sixteenth notes. Phew. I hope that made sense.
50. First you have to find out what a quarter of 400 is before you can take half of that number. So one quarter of 400 is the same as dividing by 4, so the answer is 100. Then you'll need to take half of that number, which is 50.
Yes, half of a circle made of eights is 4 eights. Take away 3 eight you still have 1 left.
Twenty-eight and one eighth.
32 - 0.25 = 31.75 or... If by a quarter you mean a quarter of 32, 32 - 8 = 24