Question

1) -4/7 * (-2 5/8) 2) -51,34 : (-17) 3) -1 17/18 : 3 1/9 4) 6,4 * (3,7)

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

Let's solve each of the expressions step by step:

1. -4/7 * (-2 5/8): To multiply fractions, simply multiply the numerators and denominators separately and then simplify if possible.

-4/7 * (-2 5/8) = (-4/7) * (-21/8) = (4/7) * (21/8) (Since negative multiplied by negative is positive) = 84/56 = 3/2

So, -4/7 * (-2 5/8) = 3/2.

2. -51.34 : (-17): To divide a number by another number, just perform the division operation.

-51.34 / (-17) = 51.34 / 17 = 3.02

So, -51.34 : (-17) = 3.02.

3. -1 17/18 : 3 1/9: To divide mixed numbers, convert them to improper fractions and then proceed with the division.

-1 17/18 = -(18 + 17)/18 = -35/18 3 1/9 = (27 + 1)/9 = 28/9

Now, perform the division:

-1 17/18 : 3 1/9 = (-35/18) : (28/9) = (-35/18) * (9/28) (Reciprocal of the divisor) = -315/504 = -35/56

So, -1 17/18 : 3 1/9 = -35/56.

4. 6.4 * 3.7: To multiply decimal numbers, perform the multiplication as usual.

6.4 * 3.7 = 23.68

So, 6.4 * 3.7 = 23.68.

Note: In your expressions, you used commas (,) to represent decimal points. In the standard mathematical notation, we use a period (.) instead of a comma for the decimal point.