Question

Помогите срочнооо!!!!! ​

Answer 1

Ответ:

Пошаговое объяснение:

$-12.6*0.7+4.8*(-1.7)=-16.98\\1)-12.6*0.7=-8.82\\2)4.8*(-1.7)=-8.16\\3)-8.82+(-8.16)=-8.82-8.16=-16.98$

$(-5.16+5.09)*(3.5-4)=0.035\\1)-5.16+5.09=-0.07\\2)3.5-4=-0.5\\3)-0.07*(-0.5)=0.035$

$\frac{4}{7} *(-5\frac{5}{6} )-\frac{5}{62} *(-4\frac{3}{7} )=-2\frac{41}{42} \\1)\frac{4}{7} *(-5\frac{5}{6} )=\frac{4}{7} *-\frac{35}{6} =-\frac{10}{3}$

$2)\frac{5}{62}*(-4\frac{3}{7} )= \frac{5}{62} *-\frac{31}{7} =-\frac{5}{14}$

$3)-\frac{10}{3} +\frac{5}{14} =-\frac{140}{42} +\frac{15}{42} =-\frac{125}{42} =-2\frac{41}{42}$

$(-5\frac{1}{4} -6\frac{1}{6} )*(3\frac{1}{4} -0.55)=-30.825\\1)(-5\frac{1}{4} -6\frac{1}{6} )=-\frac{21}{4} -\frac{37}{6} =-\frac{63}{12} -\frac{74}{12} =- \frac{137}{12} \\2)(3\frac{1}{4} -0.55)=\frac{13}{4} -\frac{55}{100} =\frac{325}{100} -\frac{55}{100} =\frac{270}{100} \\3)-\frac{137}{12} *\frac{270}{100} =-\frac{12330}{400} =-\frac{1233}{40} =-30\frac{33}{40} =-30.825$