in 2nd video i can' t understand the last  that why they subtract 89 from 94 and add1 to 123 but in ist video they don' t do anything like that please explain this to me

because the remainder of this question was greater than the divisor which is not possible.Thats why, we have to subtracted 89 from 94 whichs gives 5 as our new remainder and as we have once  done the subtraction ( as we do in dvsion)we add 1 more to 123 which gives us 124.

try to find the answer of this question by the traditional method . that will also give you the same answer

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its very easy method and the upper coment has written all the explenation 

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