Question

EX 13 VA ROG URGENT DAU 75 PUNCTE .

Answer 1

Răspuns:

Explicație pas cu pas:

a)

20/9 : 8/3 = 20/9 * 3/8 = 5/6

b)

-10/7 * 21/25 = -6/5

c)

-16/27 * (-9/4) = 4/3

d)

125/12 * (- 9/100) = -15/16

e)

-48/15 : -27/25 = 48/15*25/27 = 80/27

f)

24 *-7/36 = -14/3

g)

-57/3 : -19 = 57/3*1/19 = 1

h)

21/10 : 42 = 21/10 *1/42 = 1/20

i)

0 : 8/3 = 0

Answer 2

Răspuns:

13.

a)

$\frac{20}{9} \div \frac{8}{3} = \frac{20}{9} \times \frac{3}{8} = \frac{5}{6}$

b)

$\frac{ - 10}{7} \times \frac{21}{25} = \frac{ - 6}{5}$

c)

$\frac{ - 16}{27} \times ( \frac{ - 9}{4} = \frac{4}{3}$

d)

$\frac{125}{12} \times ( \frac{ - 9}{100} = \frac{ - 15}{16}$

e)

$\frac{ - 48}{ 15} \div \frac{ - 27}{25} = \frac{48}{15} \times \frac{25}{27} = \frac{80}{27}$

f)

$24 \times \frac{ - 7}{36} = \frac{ - 14}{3}$

g)

$\frac{ - 57}{3} \div 19= \frac{57}{3} \times \frac{1}{19} = 1$

h)

$\frac{21}{10} \div 42 = \frac{21}{10} \times \frac{1}{42} = \frac{1}{20}$

i)

$0 \div \frac{8}{3} = 0$