Ребят помогите пжлст. Created by SashaKart. matematika-ru

Ребят помогите пжлст...

StesnyaШka A) $(6-2 \frac{1}{10} *2 \frac{1}{7} )* \frac{4}{15} = \frac{2}{5}$

b) $(2 \frac{2}{3} -2 \frac{2}{9} )*(2-1 \frac{1}{2} )= \frac{2}{9}$

c) $(3 \frac{3}{11} *1 \frac{2}{9} -2 \frac{3}{8} )* \frac{16}{39} = \frac{2}{3}$
d) $( \frac{9}{16} +4 \frac{2}{3} * \frac{9}{56} )*1 \frac{1}{7} = \frac{111}{784}$

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3lukaoyh62y А) (6-2 1/10*2 1/7)*4/15 = (6/1-21/10*15/7)*4/15 = (6/1-315/70)*4/15 = (6/1-9/2)*4/15 = (12/2-9/2)*4/15 = 3/2*4/15=12/30=2/5

б) (2 2/3-2 2/9)*(2-1 1/2) = (8/3-20/9)*(2/1-3/2) = (24/9-20/9)*(4/2-3/2) = 4/9*1/2=4/18=2/9

в) (3 3/11*1 2/9-2 3/8)*16/39 = (36/11*11/9-19/8)*16/39 = (396/99-19/8)*16/39 = 117/72*16/39 = 1872/2808=2/3

г) (9/16+4 2/3*9/56)*1 1/7 = (9/16+14/3*9/56)*8/7 = (9/16+126/168)*8/7 = (9/16+3/4)*8/7 = (9/16+12/16)*8/7 = 21/16*8/7 = 168/112=3/2=1 1/2

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