Help please, tomorrow independent on this subject, the same examples, only numbers others will be. Well, help me to solve it.

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a) 4 1/6 + 3 2/5 the mixed fractions we turn These into wrong:

(4*6+1)/6 + (3*5+2)/5 = 25/6 +17/5

we Look for a common denominator for these fractions - it will be equal to the work of denominators: 6*5. Since we increased a denominator, in order that the fraction did not change we have to increase in corresponding number of times and numerator, i.e. for the first fraction by 5 times, and for the second fraction by 6 times:

25*5/6*5 + 17*6/6*5 =125/6*5 + 102/6*5 =227/30 = 7 whole and 6/30 and 7 whole and 1/5

Other examples similar. The main thing is correct to define the smallest common denominator. In practice I will tell not to bother with search of the smallest denominator most often use the work of all denominators.

b) 8 3/4 - 7 5/6 V this example can be taken as the smallest common denominator number 12 since also number 12 shares also on "4 " and on "6 ", and it is possible to take the work "4*6=24 ". Thus:

8 3/4 - 7 5/6 = 35/4 - 47/6 = 35*6/4*6 - 47*4/6*4=210/4*6 - 188/4*6 = 12/4*6 = 12/24=1/2

an integer we present

e) in this example in the form of fraction having divided it into 1, and we transfer the second to an improper fraction:

5 - 2 5/9 = 5/1 - 23/9 =5*9/9 - 23/9 = 45/9 - 23/9 = 22/9 = 2 whole and 4/9

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