Question

(2,6 + 1 целая 2/5) * (4 целых - 2 4/25) = (14 целых - 2 целых 3/10) : (3/5 +0,7) = (решите уравнения) 3,5 * (x + 2 целых 1/4 = 14 (7,1 -x) : 3,6 = 1 целая 1/2

Answer 1

(2,6+1 2/5)*(4-2 4/25)=(2,6+1,4)*(4-2,16)=4*1,84=7,36
(14-2 3/10):(3/5+0,7)=(14-2,3):(0,6+0,7)=11,7:1,3=9
3,5*(х+2 1/4)=14
3,5*(х+2,25)=14
х+2,25=14:3,5
х+2,25=4
х=4-2,25
х=1,75
(7,1-х):3,6=1 1/2=1,5
7,1-х=1,5*3,6
7,1-х=5,4
х=1,7

Answer 2

Let's break down each part of the problem:

1. (2,6 + 1 целая 2/5) * (4 целых - 2 4/25)

To simplify this expression, we first need to convert the mixed numbers into improper fractions:

2,6 = 2 + 6/10 = 2 + 3/5 = 13/5 1 целая 2/5 = 1 + 2/5 = 7/5 4 целых - 2 4/25 = 4 + 96/25 = 104/25

Now we can multiply:

(13/5) * (104/25) = (13 * 104) / (5 * 25) = 1352/125

We can simplify this fraction by dividing both the numerator and denominator by their greatest common factor (GCF), which is 8:

1352/125 = (8 * 169) / (8 * 125) = 13.592

Therefore, (2,6 + 1 целая 2/5) * (4 целых - 2 4/25) = 13.592.

2. (14 целых - 2 целых 3/10) : (3/5 +0,7)

Again, we need to convert the mixed numbers into improper fractions:

14 целых = 14 2 целых 3/10 = 2 + 3/10 = 23/10 3/5 + 0,7 = 3/5 + 7/10 = 6/10 + 7/10 = 13/10

Now we can divide:

(14 - 23/10) / (13/10) = (140/10 - 23/10) / (13/10) = 117/13

We can simplify this fraction by dividing both the numerator and denominator by their GCF, which is 13:

117/13 = 9

Therefore, (14 целых - 2 целых 3/10) : (3/5 +0,7) = 9.

3. 3,5 * (x + 2 целых 1/4 = 14 (7,1 -x) : 3,6

We need to first simplify the right-hand side:

14 (7,1 -x) : 3,6 = (14 * 71/10) / (36/10) = (994/10) / (36/10) = 27.611

Now we can solve for x by isolating it on one side of the equation. First, we need to simplify the left-hand side:

3,5 * (x + 2 целых 1/4) = 7/2 * (x + 9/4) = 7/2x + 63/8

So we have:

7/2x + 63/8 = 27.611

Subtracting 63/8 from both sides:

7/2x = 27.611 - 63/8

Finding a common denominator:

7/2x = (221/8 - 63/8) / 1 = 158/8

Multiplying both sides by 2/7:

x = (158/8) * (2/7) = 22/7

Therefore, the solution is x = 22/7.

4. 1 целая 1/2

This is a mixed number, which can be converted into an improper fraction:

1