7)518 =
We say 7 into 51 goes 7 times remainder '2' ( 7 x 7 = 49 + 2 = 51)
So the first part of the answer is '7'
Hence 7)518 = 7 ...
The remainder '2' is combined weith the '8' as;28; ( NOT 10).
We say 7 into 28 goes 4 times remainder '0' ( 7 x 4 = 28 + 0 = 28)
So thesecond part of ther answer is ' 4'.
Hence
7)518 = 74 The answer/
NB Once the remainder is reduced to 'zero' that is the dend of the division.
Factoring: 518 = 2 * 259 Since 518 is even (it ends in 8, which is even) I know I can divide by 2. 518 = 2 * 7 * 37 Changing 259 into prime factors takes some work. Start by trying to divide it by 2, then 3, then 5, then 7 etc. Once you divide by 7 and get 37, that's as far as you can go. 37 is a prime number and cannot be factored any further. The prime factors of 518 are: 2, 7, 37.
518 x 7 = 3626
7 divided 518 = 0.013513513513513514
They are 37*7*2 = 518
0.0135
The factors of 518 are: 1 2 7 14 37 74 259 518
2 x 7 x 37 = 518
518 = 2 x 7 x 37
518
74
518... Why not use a calculator?
Yes. Divide both numbers by their greatest common factor = 2.