Question

1) 5/7 * (-2,6)*0,6*(-2 1/3) 2) -8/9 * (5/29)**9/16 *(-58) 3) -42/55 :(-98/99) 4) -1 1/27 :7 7/9

Answer 1

Пошаговое объяснение:

(минус уничтожается)

--- это черта дроби

1)5*2,6*0,6*7.

-------------------= 5*2,6*0,2= 2,6

7*3

2)8*5*9*58. 5*58

-------------- = ---------=5

9*29*16. 29*2

при делении вторая дробь переворачивается:

3)42*99

----------- = 0,7

55*98

28*70. 1960

4)- ----------- = - --------- = - 8,06

27*9. 243

Answer 2

Sure, I can help you with these calculations. Let's take them one by one:

1. $\frac{5}{7} \times (-2.6) \times 0.6 \times (-2 \frac{1}{3})$

$\frac{5}{7} \times (-2.6) \times 0.6 \times (-2 \frac{1}{3})$

$= \frac{5}{7} \times (-2.6) \times 0.6 \times (-\frac{7}{3})$ (since $2 \frac{1}{3} = \frac{7}{3}$)

$= -\frac{156}{35}$

2. $-\frac{8}{9} \times \left(\frac{5}{29}\right)^{\frac{9}{16}} \times (-58)$

$-\frac{8}{9} \times \left(\frac{5}{29}\right)^{\frac{9}{16}} \times (-58)$

$\approx -\frac{8}{9} \times 0.15426 \times (-58)$ (Approximating $\left(\frac{5}{29}\right)^{\frac{9}{16}}$)

$\approx 0.97458 \times (-58)$

$\approx -56.45$

3. $-\frac{42}{55} \div (-\frac{98}{99})$

$-\frac{42}{55} \div (-\frac{98}{99})$

$= -\frac{42}{55} \times (-\frac{99}{98})$ (Dividing by a fraction is the same as multiplying by its reciprocal)

$= \frac{198}{110}$

$= \frac{99}{55}$

4. $-1 \frac{1}{27} \div 7 \frac{7}{9}$

$-1 \frac{1}{27} \div 7 \frac{7}{9}$

$= -\frac{28}{27} \div \frac{70}{9}$ (Converting mixed fractions to improper fractions)

$= -\frac{28}{27} \div \frac{70}{9} \times \frac{9}{70}$ (Dividing by a fraction is the same as multiplying by its reciprocal)

$= -\frac{4}{27}$

If you have any further questions, please, let me know.