They are multiplicands.
a factor.
Multiple
a factor or a divisor
A decimal number is multiplied by a non-decimal number the same way any two numbers are multiplied together. The place value of the numbers being multiplied must be kept in mind though. So if 2x3=6, just as 2x30=60, 2x0.3 would be 0.6. For numbers with more than one digit, you would treat the multiplication the same way as for non decimal numbers.
same number multiplied by one
All numbers can be multiplied that way. A prime number is one that can only be divided by one and itself.
the multiplicand
huh. not a formal proof, but intuition says no, since decimal places represent fractions, and multiplication of fractions leads to smaller numbers (or more less than one), leading to more decimal places.
The product.
One of the numbers must be less that 1
They are: 7*8 = 56 as one example
1,2, 3,15 is one combination
2 x 7 x 12
1, 2.5 and 24 is one possible set of numbers.
3/4 x 1 1/4=3/4 x 5/4 (change from a mixed number to a improper fraction)=15/16 (top numbers multiplied together and the bottom numbers multiplied together)
3 and 12
Umm............ a lot of numbers could work. One is 70 and 3.