Short cut method of dividing by 7 when a number is divisible by 7.
This method is based on divisibility test for 7.
When a number passes this test , use the calculation done to find the quotient.
1) Calculate quotient for last step.
2) For a step, add the subtracted number and the right-most digit for that step.
3) Write this addition below quotient in first step such that only one digit comes extra at the right.
4) Repeat the steps 2) and 3) till you reach the dividend (the number you wanted to divide by 7).
http://mathandmultimedia.com/2012/02/29/divisibility-by-7-and-its-proof/
This method is based on divisibility test for 7.
When a number passes this test , use the calculation done to find the quotient.
1) Calculate quotient for last step.
2) For a step, add the subtracted number and the right-most digit for that step.
3) Write this addition below quotient in first step such that only one digit comes extra at the right.
4) Repeat the steps 2) and 3) till you reach the dividend (the number you wanted to divide by 7).
http://mathandmultimedia.com/2012/02/29/divisibility-by-7-and-its-proof/
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