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\(A=-5,13:\left(5\frac{5}{28}-1\frac{8}{9}.1,25+1\frac{16}{63}\right)\)
\(A=-5,13:\left(5\frac{5}{28}-\frac{85}{36}+1\frac{16}{63}\right)\)
\(A=-5,13:\frac{57}{14}=-\frac{63}{50}\)
\(B=\left(3\frac{1}{3}.1,9+19,5:4\frac{1}{3}\right).\left(\frac{62}{72}-\frac{4}{25}\right)\)
\(B=\left(\frac{19}{3}+\frac{9}{2}\right).\frac{631}{900}\)
\(B=\frac{65}{6}.\frac{631}{900}=\frac{8203}{1080}\)
A = -5,13 : (25/28 - 8/9 . 1,25 + 16/63)
= -5,13 : (25/28 - 10/9 + 16/63)
= -5,13 : 1/28 = -3591/25 (-143,64)
B = (1 . 1,9 + 19,5 : 4/3) . (62/75 . 4/25)
= ( 1,9 + 117/8 ) . 248/1875
= 661/40 . 248/1875 = 2,185...
\(-5,6x+2,9x-3,86=-9,8\)
\(-2,7x=-9,8+3,86\)
\(-2,7x=-5,94\)
\(x=-5,94:\left(-2,7\right)\)
\(x=2,2\)
\(A=-5,13:\left(5\frac{5}{28}-1\frac{8}{9}.1,25+1\frac{16}{63}\right)\)
\(A=-5,13:\left(\frac{145}{28}-\frac{17}{9}.\frac{5}{4}+\frac{79}{63}\right)\)
\(A=-5,13:\left(\frac{145}{28}-\frac{85}{36}+\frac{79}{63}\right)\)
\(A=-5,13:\left(\frac{355}{126}+\frac{79}{63}\right)\)
\(A=-5,13:\frac{57}{14}\)
\(A=-1,26=\frac{-63}{50}\)
\(B=\left(3\frac{1}{3}.1,9+19,5:4\frac{1}{3}\right).\left(\frac{62}{75}-\frac{4}{25}\right)\)
\(B=\left(\frac{10}{3}.\frac{19}{10}+\frac{39}{2}.\frac{3}{13}\right).\frac{2}{3}\)
\(B=\left(\frac{19}{3}+\frac{9}{2}\right).\frac{2}{3}\)
\(B=\frac{65}{6}.\frac{2}{3}\)
\(B=\frac{65}{9}\)
học tốt
Lời giải:
$M=-5,13(5+\frac{5}{28}-2-\frac{1}{9}-1,25+1+\frac{16}{69})$
$=-5,13.\frac{8837}{2898}=-15,643$