k+7/10 where k is any integer.
7.
0.3
156
You subtract 6704.
14 is, itself, a whole number.
If you want to use a number line to add and subtract, it can be done with a slide rule. But it is much easier to use an electronic calculator.
1
376 − 370 = 6
Can be any number you choose, One can be divided into an almost infinite number of parts. Imagine a pizza (1 whole) every time you slice it you are increasing the number required to make 1.
Three Fifths is not a whole number it's only 60% of a whole.
Subtract.
536 - 528 = 8