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PrincessMogo
I can only help with 3, sorry.
But with 3, it's practically the same, because if you move the decimals in the first equation, to the right, two times, it'll cause it to be the 2nd equation. 
So 0.04 -> 4 (When you move the decimals down to times)
Also, 3.6 -> 360 (When you move the decimals down to times)
2. 
c goes under 52
d, b and f under 5.2
a  and e goes under .52
3.
Because once you move the decimal places on the first problem to make the problem correct they are the same problem
4. 
It gives a greater quotient because you are essential multiplying by the reciprocal
Hope i helped

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