Question

1)1,025-2\25 2)0,052-5 7\28 3) 2 1\4 -3,005 4 ) -4 21\35+2,043 помогитее

Answer 1

Ответ:

Пошаговое объяснение:

1)1,025-2\25 =1.025-0.08=0.945

2)0,052-5 7\28 =0.052-5.25=-5.198

3) 2 1\4 -3,005 =2.25-3.005=-0.755

4 ) -4 21\35+2,043 =-4.6+2.043=-2.557

Answer 2

Sure, I'd be happy to help you with these calculations. Let's solve each expression step by step:

1. 1,025 - (2/25) To perform this subtraction, convert 1,025 to a fraction with a common denominator of 25:

1,025 = 1,025/1

Now, subtract the fractions:

1,025/1 - 2/25

To combine the fractions, find a common denominator, which is 25 in this case:

(1,025 * 25) / 25 - 2/25

Now, the expression becomes:

(25,625 - 2) / 25

Finally, perform the subtraction:

23,625 / 25 = 946.5

So, 1,025 - (2/25) = 946.5.

2. 0,052 - (5 + 7/28) Convert 0,052 to a fraction:

0,052 = 52/1000

Now, simplify the fraction:

52/1000 = 13/250

Now, perform the subtraction inside the parentheses:

(13/250) - (5 + 7/28)

To combine the fractions, find a common denominator, which is 28 in this case:

(13/250) - ((5 * 28 + 7) / 28)

Now, the expression becomes:

(13/250) - (140 + 7) / 28

Perform the subtraction inside the parentheses:

(13/250) - 147 / 28

To combine the fractions, find a common denominator, which is 250 in this case:

(13/250) - ((147 * 10) / 28)

Now, the expression becomes:

(13/250) - 5250 / 28

To combine the fractions, find a common denominator, which is 250 in this case:

(13 - 5250) / 250

Now, perform the subtraction:

(-5237) / 250 = -20.948

So, 0,052 - (5 + 7/28) = -20.948.

3. 2 1/4 - 3,005 Convert 2 1/4 to an improper fraction:

2 1/4 = (2 * 4 + 1) / 4 = 9/4

Now, perform the subtraction:

(9/4) - 3.005

To combine the fractions, convert 3.005 to a fraction:

3.005 = 3005/1000

Now, the expression becomes:

(9/4) - 3005/1000

To combine the fractions, find a common denominator, which is 1000 in this case:

(9 * 250 - 3005) / 1000

Now, perform the subtraction:

(2250 - 3005) / 1000 = -755/1000 = -0.755

So, 2 1/4 - 3.005 = -0.755.

4. -4 21/35 + 2,043 Convert -4 21/35 to an improper fraction:

-4 21/35 = (-4 * 35 + 21) / 35 = (-139) / 35

Now, perform the addition:

(-139) / 35 + 2.043

To combine the fractions, convert 2.043 to a fraction:

2.043 = 2043/1000

Now, the expression becomes:

(-139) / 35 + 2043/1000

To combine the fractions, find a common denominator, which is 1000 in this case:

(-139 * 28 + 2043) / 1000

Now, perform the addition:

(-3892 + 2043) / 1000 = (-1849) / 1000 = -1.849

So, -4 21/35 + 2.043 = -1.849.

I hope this helps! If you have any further questions, feel free to ask.