I dont think it will be wrong either ways :)
a number sentence contains an equal sign
The magnitude of the sum is the difference between the magnitudes of the two numbers. The sign of the sum is the sign of the number with the larger magnitude. (The "magnitude" of a number is just the size of the number without any sign.)
It is the space between two real numbers.
If the number has a + sign then you add it, if it has a - sign, then you subtract it.
I dont think it will be wrong either ways :)
No, do not skip a space between the $ sign and the amount.
No. $34 correct. $ 34 incorrect
No.
Yes, meter can be abbreviated as m in the US, and yes, leave a space between the number and the m.
a number sentence contains an equal sign
Yes, it is generally recommended to put a space between a number and its unit to make it easier to read and understand. For example, "10 cm" or "50 kg."
Yes!
The magnitude of the sum is the difference between the magnitudes of the two numbers. The sign of the sum is the sign of the number with the larger magnitude. (The "magnitude" of a number is just the size of the number without any sign.)
The size of the number ... the distance between zero and the number on a number line ... and its sign, positive or negative.
Use 1 space between words.
The number 286, followed by 80 with a space between.