Question

34/7+131/21=? и 38/9/19/18=? плиз

Answer 1

34/7+131/21=102/21+131/21=233/21=
11 2/21

Answer 2

34/7+131/22=34/7+131/21=233/21
38/9/19/18=38/9*1/19*1/18=2/9*1/18=1/9*1/9=1/81

Answer 3

Let's solve the two mathematical expressions step by step:

1. 34/7 + 131/21: To add these fractions, we need to find a common denominator, which is the least common multiple (LCM) of 7 and 21, which is 21.

Now, we'll convert both fractions to have the same denominator (21): 34/7 = (34/7) * (3/3) = 102/21 131/21 remains unchanged.

Now, we can add the fractions: 102/21 + 131/21 = (102 + 131) / 21 = 233/21

So, 34/7 + 131/21 = 233/21.

2. 38/9 ÷ 19/18: To divide fractions, we'll multiply the first fraction by the reciprocal of the second fraction.

38/9 ÷ 19/18 = 38/9 * 18/19

Now, let's simplify: 38/9 * 18/19 = (38 * 18) / (9 * 19) = 684 / 171 = 4

So, 38/9 ÷ 19/18 = 4.