Numbers

21.02 = 211/50

1,2,3,5,6,10,15,30

The prime factorization of 52 is 22 * 13.

Multiplying by a reciprocal

Prime factors of numbers are small numbers that the bigger (original) number can divide by. The prime factors have to be prime. This means they only have two factors, itself and one.

cuz 1, 2

Because they are both multiples of two, so when they're added, the sum must be

another multiple of two.

(One group of twos plus another group of twos must be a new group of twos, just

like one group of cows plus another group of cows must be a new group of cows.)

There are none.

13 x 3 = 39

so it is 3 with 4 left over (43 - 39 = 4)

3.4/13 or 3-4/13

Three and four-thirteenths

16 is one example.

Both rational numbers and integers are subsets of the set of real numbers.

The may give additional precision or may be indicators of the number of significant digits in the calculation.

As an example of the latter,

5.000 kilometres is, at first sight, no different from 5 km. But, 5 km could represent any length from 4.5 to 5.5 km (rounded to the nearest integer). Whereas 5.000 km can only range from 4.995 to 5.005 km. This difference is important for error analysis.

Nine hundred ninety-seven and nine hundred ninety-one ten-thousandths.

January twenty one.

Any number divided by itself is the same as ' 1 '.

A pair of prime numbers are always relatively prime, whether they are consecutive or not. This is so because "relatively prime" means they have no common factors.

it is a composite number

No because it has more than two factors

No because it can be expressed as a fraction in the form of 4959/1000

Yes.

Decimals can be positive or negative.

yes! ;)

8E

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97

13 and 23