Question

найдите значения выражений А)8-3 6/7 б)2 1/8+3 5/12 в) 5 13\15 +1 7/12 г)7 3/8 - 3 5/6

Answer 1

$1) 8-3 \frac{6}{7}=8-3- \frac{6}{7}=5- \frac{6}{7}=4+1- \frac{6}{7}=4+ \frac{1}{7}=4 \frac{1}{7} \\ \\ 2) 2 \frac{1}{8}+3 \frac{5}{12}= 2+ \frac{1}{8}+3 +\frac{5}{12}=2+3 +\frac{1}{8}^{(3} +\frac{5}{12}^{(2}= \\ \\ 5+ \frac{3}{24}+ \frac{10}{24}= 5+ \frac{13}{24} =5 \frac{13}{24}$

$3) 5 \frac{13}{15}+1 \frac{7}{12}= 5+ \frac{13}{15}+1 +\frac{7}{12}=5+1 + \frac{13}{15}^{(4}+\frac{7}{12}^{(5}= \\ \\ 6+ \frac{52}{60}+ \frac{35}{60}=6+ \frac{87}{60}^{(3} =6+ \frac{29}{20}= \\ \\ 6+1 \frac{9}{20}=7 \frac{9}{20}$

$4)7 \frac{3}{8}-3 \frac{5}{6}=7+ \frac{3}{8}-3 -\frac{5}{6}=7-3 + \frac{3}{8}^{(3}-\frac{5}{6}^{(4}= \\ \\ 4+ \frac{9}{24}- \frac{20}{24}=3+1+ \frac{9}{24}- \frac{20}{24}=3+1 \frac{9}{24}- \frac{20}{24}= \\ \\ 3+ \frac{33}{24}- \frac{20}{24}=3+ \frac{13}{24} =3 \frac{13}{24}$