some skills in division

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to divide any number by 50 = multiply it by 2 then divide by 100 
ex : 150/50= 150 * 2 = 300 then 300 /100 = 3 

to divide any number by 500 = multiply it by 2 then divide by 1000
ex: 1500/500= 1500*2 = 30000 then 30000/1000 = 3 to divide any number by 5 = multiply it by 2 then divide by 10

ex :15/5 = 15*2 = 30 then 30/10 = 3 
to divide any number by 25 = multiply it by 4 then divide by 100 
to divide any number by 250 = multiply it by 4 then divide by 1000

to divide any number by 75 =  divide it by 3 then multiply it by 4 then divide by 100 
ex : 150 / 75 = 150/3=50 then 50 *4 = 200 then 200 / 100 = 2