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Расчет дроби 1(3/7) + 8(21/49) = 69/7



1
3
7
+
8
21
49
=
69
7
9.857
Solution:
1
3
7
+
8
21
49
=
1*7+3
7
+
8*49+21
49
=
7+3
7
+
392+21
49
=
10
7
+
413
49
=
10*7
7*7
+
413
49
=
70
49
+
413
49
=
70+413
49
=
483
49
=
69*7
7*7
=
69
7
9.857
Detailed explanation of the solution:
1.Conversion of mixed fractions to ordinary fractions
1
3
7
+
8
21
49
=
1*7+3
7
+
8*49+21
49
=
7+3
7
+
392+21
49
=
10
7
+
413
49
2.Bringing to a common denominator
10
7
+
413
49
=
10*7
7*7
+
413
49
=
70
49
+
413
49
3.Additionfractions with common denominators
70
49
+
413
49
=
70+413
49
=
483
49
4.Reduce the fraction and get the result
483
49
=
69*7
7*7
=
69
7
9.857