Question

How do basic facts and patterns help me multiply a number by a multiple of 10

Answer 1

It makes your life easier.One way is by just adding a 0 after the number.
Ex 2*10 is 20 see what I mean.

Answer 2

Multiplying a number by 10 makes calculations much easier

Explanation:

To multiply a number by
`10^(n)`, add n zeroes to a number.

For example, 25×1000=25×10³=25000

Consider the following pattern:

`5* 10=50\\5* 10^2=500\\5* 10^3=5000\\5* 10^4=50000\\5* 10^5=500000\\5* 10^6=5000000`

So, basic rules of multiplying a number by 10 makes calculations much easier.

Foe example consider the following example:

`26* 20* 30=26* (2* 10)* (3* 10)=26* 6* 100=15600`