Question

помогите пж срочно
абадудьуьцд​

Answer 1

Объяснение:

$-4\frac{2}{8}$$-(-4\frac{1}{4} )$$=-\frac{34}{8}+4\frac{1}{4}=$$-\frac{34}{8} +\frac{17}{4} =0$

$3\frac{1}{7}-(-1 \frac{5}{8})=3 \frac{1}{7} +1\frac{5}{8} =(3+1)+(\frac{1}{7} +\frac{5}{8})$$=4+\frac{43}{56}=4\frac{43}{56}=\frac{267}{56}$

$-4\frac{2}{7}+4\frac{2}{9}=-\frac{30}{7}+\frac{38}{9}=-\frac{4}{63}$

$-(-4\frac{2}{9})+9\frac{3}{7}=4\frac{2}{9}+9\frac{3}{7}$$(4+9)+\frac{2}{9}+\frac{3}{7}=13+\frac{41}{63}=13\frac{41}{63}=\frac{860}{63}$

$-8\frac{4}{7}+8\frac{6}{9}=-(8+\frac{4}{7})+8+\frac{6}{9}=-8-\frac{4}{7}+8+\frac{6}{9}$$=(-8+8)+(-\frac{4}{7}+\frac{6}{9}=0+\frac{2}{21}=\frac{2}{21}$

$-4\frac{5}{9}+(-4\frac{5}{9})=-4\frac{5}{9}-4\frac{5}{9}=-(4\frac{5}{9}+4\frac{5}{9})=-((4+4)+(\frac{5}{9}+\frac{5}{9}))=-(8+\frac{10}{9})=-(8+1\frac{1}{9})=-(8+1+\frac{1}{9})=-(9+\frac{1}{9})=-9\frac{1}{9}=-\frac{82}{9}$

$-(-3\frac{7}{9})+(-3\frac{7}{8})=3\frac{7}{9}-3\frac{7}{8}=\frac{34}{9}-\frac{31}{8}=-\frac{7}{72}$