Question

Oblicz, pamietając o kolekjności wykonywania działań.

a) (15i2/3-7i1/2):1i1/2=

b) 4i1/2*1i1/3-2i2/5*5/7=

c) 1i2/3-5/6+2i1/10:1i6/15=

d) (5/8+1/2):1i1/2-1/3

plisss pomuszcie daje naj

Answer 1

15[2/3] ja tak zapisuje 15 i 2/3

 

a) (15[2/3]-7[1/2]):1[1/2]=(15[4/6]-7[3/6]):1[1/2]=8[1/6]:1[1/2]=8[1/6]:1[1/2]=49/6:3/2=4/6*2/3=98/18

=5[8/18]=5[4/9]

b) 4[1/2]*1[1/3]-2[2/5]*5/7=9/2*4/3-12/5*5/7=36/6-60/35=6-1[25/35]=4[10/35]=4[2/7]

c) 1[2/3]-5/6+2[1/10]:1[6/15]=1[2/3]-5/6+21/10:21/15=1[2/3]-5/6+21/10*15/21=1[2/3]-5/6+315/210

=1[4/6]-5/6+1[105/210]=10/6-5/6+1[1/2]=5/6+1[1/2]=5/6+1[3/6]=1[8/6]=2[2/6]=2[1/3]

d) (5/8+1/2):1[1/2]-1/3=(5/8+4/8):1[1/2]-1/3=1[1/8]:1[1/2]-1/3=9/8:3/2-1/3=9/8*2/3-1/3=18/24-1/3=

18/24-8/24=10/24=5/12

mam nadzieję, że pomogłam! jakby co to pisz do mnie