Fractions and decimals
All numbers between negative one and zero are negative. When you multiply a number by a negative it becomes negative. Also, all numbers between negative one and zero are decimals. When you multiply a number by a decimal it becomes smaller. Thus, when you multiply a rational number by a number between negative one and zero, it becomes smaller and negative.
Once again, if you're talking about whole numbers, then negative integers and zero. But since fractions and decimals are numbers, and are not integers, anything between negative infinity to 1 are before one. So fractions and/or decimals between 1 and zero, such as 1/2, 0.9, and anything between negative infinity and zero, such as -1024, -6/13, 69.029.
1
One of the numbers being zero makes no difference.
25
There are an infinite amount of numbers between zero (0) and one (1).
Fractions and decimals
Answer: There are six. Answer: There is no such thing as "significant numbers". I assume you mean "significant digits". All digits are significant in this case - a zero (or more than one zero) between other digits is always significant.
Infinitely many. In fact, between any two different real numbers, there are infinitely many rational numbers, and infinitely many irrational numbers. (More precisely, beth-zero rational numbers, and beth-one irrational numbers - that is, there are more irrational numbers than rational numbers in any such interval.)
All numbers between negative one and zero are negative. When you multiply a number by a negative it becomes negative. Also, all numbers between negative one and zero are decimals. When you multiply a number by a decimal it becomes smaller. Thus, when you multiply a rational number by a number between negative one and zero, it becomes smaller and negative.
3, one of the rules is counting the Zero between none zero numbers
90 of them.
Once again, if you're talking about whole numbers, then negative integers and zero. But since fractions and decimals are numbers, and are not integers, anything between negative infinity to 1 are before one. So fractions and/or decimals between 1 and zero, such as 1/2, 0.9, and anything between negative infinity and zero, such as -1024, -6/13, 69.029.
1
One or both of the numbers must be zero.
One of the numbers being zero makes no difference.