Question

1) 25,2:3 12+(6-4 13)*0,6=
2)(7-1 512):6,7+(5,75-3 16):15,5 =
Помогите....

Answer 1

$1)~25,2:3 dfrac{1}{2}+(6-4 dfrac{1}{3})cdot 0,6=\ \=25,2:3,5+(5dfrac{3}{3}-4dfrac{1}{3})cdot 0,6=\ \ =252:35+1dfrac{2}{3}cdot dfrac{6}{10}=\ \=7,2+dfrac{5}{3}cdot dfrac{3}{5}=7,2+1=boldsymbol{8,2}$

$2)~Big(7-1 dfrac{5}{12}Big):6,7+Big(5,75-3 dfrac{1}{6}Big):15,5 =\ \ =Big(dfrac{84}{12}-dfrac{17}{12}Big):dfrac{67}{10}+Big(dfrac{575}{100}-dfrac{19}{6} Big) :dfrac{155}{10} =\ \=dfrac{67}{12}cdotdfrac{10}{67}+Big(dfrac{23}{4}-dfrac{19}{6} Big):dfrac{31}{2}=\ \ =dfrac{5}{6}+Big(dfrac{69}{12}-dfrac{38}{12} Big)cdot dfrac{2}{31}=dfrac{5}{6}+dfrac{31}{12}cdot dfrac{2}{31}=\ \ =dfrac{5}{6}+dfrac{1}{6}=dfrac{6}{6}=boldsymbol{1}$

Answer 2

$1) \ frac{126}{5} div frac{7}{2} + (6 - frac{13}{3} ) times frac{3}{5} = frac{126}{5} times frac{2}{7} + frac{5}{3} times frac{3}{5} = frac{18}{5} times 2 + 1 = frac{36}{5} + 1 = 8.2 \ \ 2)$

(7-17/12):67/10+(23/4-19/6):31/2=67/12*10/67+31/12*2/31=1/6*5+1/6=5/6+1/6=1