Question

А)-8,4+4,6 б) -5,1-3,9 в) -5,7+2,9 г) 3,6-6,3 д) -семь девятых+ пять шестых е) - две целых одна восьмая - одна целая пять шестых

Answer 1

А) -3.8
б)-9
в)-2.8
г)-2.7
д)0.05
е)-1.08

Answer 2

To solve these arithmetic expressions, let's perform the operations step by step:

а) -8.4 + 4.6 = -3.8

б) -5.1 - 3.9 = -9.0

в) -5.7 + 2.9 = -2.8

г) 3.6 - 6.3 = -2.7

д) -семь девятых + пять шестых

We need to find a common denominator to add these fractions. The common denominator for nine and six is 18:

-7/9 + 5/6 = (-7 * 2)/(9 * 2) + (5 * 3)/(6 * 3) = -14/18 + 15/18 = 1/18

e) - две целых одна восьмая - одна целая пять шестых

To perform this subtraction, we need to find a common denominator between 8 and 6, which is 24:

-2 1/8 - 1 5/6 = -2 - 1 + 1/8 + 5/6 = -3 + 1/8 + 20/24 = -3 + 3/24 + 20/24 = -3 + 23/24 = -2 23/24

So, the results are: а) -3.8 б) -9.0 в) -2.8 г) -2.7 д) 1/18 е) -2 23/24