Question

Найдите значение выражений а) 6/13+ 4/13-8/13(дроби все) б) 7 13/15-(2 7/15+3 4/15) в)(9 12/25-8 16/25)+4 17/25 заранее

Answer 1

$1) \frac{6}{13}+ \frac{4}{13}- \frac{8}{13}= \frac{6+4-8}{13}= \frac{2}{13}$

$2)7 \frac{13}{15}-(2 \frac{7}{15}+3 \frac{4}{15})=7 \frac{13}{15}-5 \frac{11}{15}=2 \frac{2}{15}$

$3)(9 \frac{12}{25}-8 \frac{16}{25})+4 \frac{17}{25}=( 8\frac{37}{25}-8 \frac{16}{25})+4 \frac{17}{25}= \frac{21}{25}+4 \frac{17}{25}=4 \frac{38}{25}= 5\frac{13}{25}$

Answer 2

А)6/13+4/13-8/13=10/13-8/13=2/13
б)7 13/15-(2 7/15+3 4/15)=7 13/15-5 11/15=2 2/15
в)(9 12/25-8 16/25)+4 17/25=(8 37/25-8 16/25)+4 17/25=21/25+4 17/25=4 38/25=5 13/25