Question

Cine știe va rog frumos!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

b)

y = 6*35/5 = 35

c)

z = 10*14/7 = 20

d)

t = 8*6/3 = 16

e)

u = 18*11/9 = 22

____________________

a)

a*b = 0,3*15 = 4,5

b)

a*b = 1,2*2,5 = 3

c)

0,25 + 3/2 = 0,25 + 1,5 = 1,75

a*b = 1,75*8 = 14

Answer 2

3. b)

$y = \frac{35 \times 6}{5} = \frac{210}{5} = 42$

c)

$z = \frac{10 \times 14}{7} = \frac{140}{7} = 20$

d)

$t = \frac{8 \times 6}{3} = \frac{48}{3} = 16$

e)

$u = \frac{18 \times 11}{9} = \frac{198}{9 } = 22$

4.a) a•b=0,3•15=4,5

b)

$a \times b = 1.2 \times 2.5 = \frac{12}{10} \times \frac{25}{10} = \frac{12 \times 25}{10 \times 10} = \frac{300}{10} = 30$

c)a•b=

$= 8 \times (0.25 + \frac{3}{2} ) = 8 \times ( \frac{25}{100} + \frac{3}{2}) = 8 \times ( \frac{25}{100} + \frac{150}{100} ) = 8 \times \frac{175}{100} = \frac{1400}{100} = 14$

d)a•b=

$( \frac{1}{2} + \frac{1}{2} \div 3) \times 12 = ( \frac{1}{2} + \frac{1}{2} \times \frac{1}{3} ) \times 12 = ( \frac{1}{2} + \frac{1 \times 1}{2 \times 3} ) \times 12 = ( \frac{1}{2} + \frac{1}{6} ) \times 12 = ( \frac{3}{6} + \frac{1}{6} ) \times 12 = \frac{4}{6} \times 12 = \frac{4 \times 12}{6} = \frac{48}{6} = 8$

*spune-mi daca nu intelegi ceva