Question

Подробное решение примеров: ПОДРОБНОЕ

1) 18 + 2 3/5 + 2 7/8 =

2) 6 11/12 - 3 1/6 - 1 1/4 =

3) 3 7/9 - 1 5/8 + 3 1/2 =

Answer 1

$frac{1}{8} +2 frac{3}{5} +2 frac{7}{8} = frac{1}{8} + frac{13}{5} + frac{23}{8} \ frac{5+104+115}{40} = frac{224}{40} =5 frac{24}{40} =5 frac{3}{5} =5.6$\ \$6 frac{11}{12} -3 frac{1}{6} -1 frac{1}{4} = frac{93}{12} - frac{19}{6} - frac{5}{4} = frac{83-38-15}{12} = frac{30}{12} =2 frac{6}{12} =2 frac{1}{2} =2.5$ \ \$3 frac{7}{9} -1 frac{5}{8} +3 frac{1}{2} = frac{272-117+252}{72} = frac{407}{72} =5 frac{47}{72}$