Question

Ex 2,3,4,5,6 va rog repede ca mi se sterg mesajele

Answer 1

Răspuns:

Explicație pas cu pas:

2a)

3/4:2/5=3/4×5/2=15/8

b)(-1/2):3/7=-7/6

c)2/3:(-3/5)==-10/9

d)(-1/11):(-3/7)=7/33

3. a=0,3 b=0,(3)

ab=3/10×3/9=1/10

a/b=3/10:3/9=9/10

5. a) -3/2

b)-5/11

c)-1/5

d)-1,2(3)=-1-(23-2)/90=-1-7/30=-37/30 inversul -30/37

6. a) 3/8(-4/15)=-2/5

b)-27/32×64/9=-3×2=-6

c)-5/8(-24/15)=3/3=1

4a)1/2+1/2+......+1/2= 1/2×20=10

b)(-1/2)+(-1/2)+......(-1/2)=20×(-1/2)=-10