3 x 3 = 9
2 x 5 = 10
2 x 2 x 3 = 12
0.10 = 1/10 so that multiplying by 0.10 is the same as dividing by 10.
It is 6 because 2*3 = 6
There are more than 10 prime numbers
10 does not have 6 prime numbers.
Multiplying numbers in scientific notation is easier when the numbers are very, very large or very, very small. Multiplying 0.000000000385 x 0.0000000474 is a pain. Multiplying 3.85 x 10-10 x 4.74 x 10-8 is not.
The prime numbers from 1 to 10 are: 2, 3, 5, 7
10 and 20 are composite numbers, not prime numbers. The prime factorization of 10 is 2 x 5. The prime factorization of 20 is 2 x 2 x 5.
3/10 are prime.
September has 19 days that are prime numbers Note: 1 is not prime or composite
The prime numbers between 10 and 20 are 11, 13, 17, and 19.
Let's say that you were multiplying 10 by 2/5 , you would turn the 10 into 10/1 which is still equal to 10 then you multiply 10/1 and 2/5 by multiplying the numerators (the top numbers) and the denominators (the bottom numbers) 10*2/1*5 = 20/5 = 4
A number which has only two factors is called a prime number. Prime numbers from 1 to 10 are 2,3,5 and 7.