Question

Решите примеры: -3/10+(4/5)=1/3-1/2=-3/4-3/8=1 1/2*(-5)=-12:(-3/4)=3/5 в 3 степени =-5*0 ,2*(-0,4)=3*(-0,5)+1=-072/-0,03=-7-9/4=19/25+2/5*(-0,6))=Дам много баллов ​

Answer 1

Ответ:

Пошаговое объяснение:

1)-3/10+(4/5)=0,5

2)1/3-1/2=-0.16

3)-3/4-3/8=-1.125

4)1 1/2*(-5)=-7.5

5)-12:(-3/4)=16

6)3/5 в 3 степени =0.024

7)-5*0 ,2*(-0,4)=0.4

8)3*(-0,5)+1=-0.5

9)-072/-0,03=24

10)7-9/4=4.75

11)19/25+2/5*(-0,6))=0.52

Answer 2

Конечно! Давайте решим примеры по очереди:

1. -3/10 + (4/5):

To solve this, we need to find a common denominator for the fractions. The common denominator for 10 and 5 is 10. Rewriting the fractions with the common denominator, we get:

-3/10 + (4/5) = -3/10 + (4/5) * (2/2) = -3/10 + 8/10

Now that the fractions have the same denominator, we can simply add the numerators:

-3/10 + 8/10 = ( -3 + 8 ) / 10 = 5/10 = 1/2

So, -3/10 + (4/5) equals 1/2.

2. 1/3 - 1/2:

To subtract fractions, we also need a common denominator. The least common multiple of 3 and 2 is 6. Rewriting the fractions with the common denominator:

1/3 - 1/2 = 2/6 - 3/6

Now we can subtract the numerators:

2/6 - 3/6 = (2 - 3) / 6 = -1/6

Therefore, 1/3 - 1/2 equals -1/6.

3. -3/4 - 3/8:

We need to find a common denominator for 4 and 8. The least common multiple of 4 and 8 is 8. Rewriting the fractions with the common denominator:

-3/4 - 3/8 = -6/8 - 3/8

Now we can subtract the numerators:

-6/8 - 3/8 = (-6 - 3) / 8 = -9/8

So, -3/4 - 3/8 equals -9/8.

4. 1 + 1/2 * (-5):

To solve this expression, we need to follow the order of operations, which is parentheses, multiplication/division, and addition/subtraction.

First, let's calculate 1/2 * (-5):

1/2 * (-5) = -5/2

Now we can add 1 to the result:

1 + (-5/2) = 2/2 + (-5/2) = (2 - 5) / 2 = -3/2

Therefore, 1 + 1/2 * (-5) equals -3/2.

5. -12 / (-3/4):

Dividing by a fraction is equivalent to multiplying by its reciprocal. So, we can rewrite the expression as:

-12 * (4/(-3)) = -12 * (-4/3)

Now we can multiply the numerators and the denominators:

-12 * (-4) / (3) = 48/3 = 16

Therefore, -12 / (-3/4) equals 16.

6. 3/5 + (3^3) + (-5 * 0) + (2 * (-0.4)):

Let's calculate each term separately:

3/5 = 3/5

3^3 = 3 * 3 * 3 = 27

(-5 * 0) = 0

2 * (-0.4) = -0.8

Now we can add all the terms:

3/5 + 27 + 0 + (-0.8) = 3/5 + 27 - 0.8

To add fractions, we need a common denominator. The common denominator for 5 and 1 is 5. Rewriting the fraction with the common denominator:

3/5 + 27 - 0.8 = 3/5 + 27 * (5/5) - 0.8 * (5/5) = 3/5 + 135/5 - 4/5

Now we can add the fractions:

3/5 + 135/5 - 4/5 = (3 + 135 - 4) / 5 = 134/5

Therefore, 3/5 + (3^3) + (-5 * 0) + (2 * (-0.4)) equals 134/5.

I hope that helps! If you have any further questions, please let me know.