Question

use the expression 10 x ? where ? represents a factor between 1 and 9.What is true about the digit in the ones place of each product?

Answer 1

Using the multiplication table of 10 times

`\begin{gathered} 10*? \\ \text{where ? represent numbers betw}een\text{ 1 and 9} \end{gathered}`

Representing the factors using 1,2,3

`\begin{gathered} 10*1=10 \\ 10*2=20 \\ 10*3=30 \\ 10*4=40 \\ 10*5=50 \\ 10*6=60 \\ 10*7=70 \\ 10*8=80 \\ 10*9=90 \end{gathered}`

The ones digit of a number is the unit digit of that number,That is, it is the number before the tens digits

On closer observation of the answers of the products, we can conclude

That the ones digit will always be zero

The feature that is true about the digit in the ones place of each product is that it will always be zero