Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
sssssssooooo sssssssaaaaaaaaannnnnnnnhhhhhhhhsssssss aaaaaaaaffffffff
\(6.-\dfrac{5}{18}=-\dfrac{5}{3}\)
\(-\dfrac{13}{24}+-\dfrac{5}{21}.\dfrac{7}{25}=-\dfrac{13}{24}+-\dfrac{1}{15}=-\dfrac{73}{120}\)
\(-\dfrac{5}{13}-\dfrac{3}{26}.-\dfrac{2}{3}=-\dfrac{5}{13}-\left(-\dfrac{1}{13}\right)=-\dfrac{4}{13}\)
\(\left(\dfrac{2}{3}+-\dfrac{7}{6}\right).\left(\dfrac{3}{8}+-\dfrac{3}{24}\right)=-\dfrac{1}{2}.\dfrac{1}{4}=\dfrac{1}{8}\)
Kết quả lần lượt của các phép tính là :
\(\dfrac{-5}{3}\) , \(\dfrac{-73}{120}\) , \(\dfrac{-4}{13}\) , \(\dfrac{-1}{8}\)
a. 472:(24+7.x)+23=26
472:(24+7.x)+8=26
472:(24+7.x)=26-8
472:(24+7.x)=18
24+7.x=472:18
24+7.x=27
7.x=27-24
7.x=3
x=3:7
x=\(\frac{3}{7}\)
b. 18-|x-1|=2
|x-1|=18-2
|x-1|=16
TH1: x-1=16
x=16+1
x=17
TH2: x-1=-16
x=-16+1
x=-15
Vậy x=17 hoặc x=-15
a) \(472:\left(24+7.x\right)+2^3=26\)
\(472:\left(24+7.x\right)=26-8\)
\(472:\left(24+7.x\right)=18\)
\(24+7.x=472.18\)
\(24+7.x=8496\)
\(7.x=24+8496\)
\(7.x=8520\)
\(x=7.8520\)
\(x=59640\)
b)\(18-|x-1|=2\)
\(x-1=18-2\)
\(x-1=16\)
\(x=16-1\)
\(x=15\)
Hk tốt,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
k nhé
\(3\dfrac{1}{2}+15\dfrac{4}{9}:\dfrac{26}{7}-2\dfrac{4}{9}:\dfrac{26}{7}\)
\(=\dfrac{7}{2}+\dfrac{139}{9}:\dfrac{26}{7}-\dfrac{22}{9}:\dfrac{26}{7}\)
\(=\dfrac{7}{2}+\left(\dfrac{139}{9}-\dfrac{22}{9}\right):\dfrac{26}{7}\)
\(=\dfrac{7}{2}+13:\dfrac{26}{7}\)
\(=\dfrac{7}{2}+\dfrac{7}{2}\)
\(=7.\)
\(3\dfrac{1}{2}+15\dfrac{4}{9}:\dfrac{26}{7}-2\dfrac{4}{9}:\dfrac{26}{7}\)
=\(\dfrac{7}{2}+\dfrac{139}{9}:\dfrac{26}{7}-\dfrac{22}{9}:\dfrac{26}{7}\)
=\(\dfrac{7}{2}+\left(\dfrac{139}{9}-\dfrac{22}{9}\right):\dfrac{26}{7}\)
=\(\dfrac{7}{2}+13:\dfrac{26}{7}\)
=\(\dfrac{7}{2}+13.\dfrac{7}{26}\)
=\(\dfrac{7}{2}+\dfrac{7}{2}\)
= 7
a) \(125\cdot\left(-24\right)+24\cdot225\)
\(=\left(225-125\right)\cdot24\)
\(=100\cdot24\)
\(=2400\)
b) \(26\cdot\left(-125\right)-125\cdot\left(-36\right)\)
\(=\left(36-26\right)\cdot125\)
\(=10\cdot125\)
\(=1250\)
nhầm (26-24)\(^3\)
Ta có :
+ 26 mũ 3 - 24 mũ 3 = 3752
+ ( 26 - 24 ) mũ 3 = 8
Vì 3752 > 8
Nên 26 mũ 3 - 24 mũ 3 > (26 - 24 ) mũ 3
( Vì mk không biết cách đánh số mũ trên máy tính nên phải ghi như trreen .Mong bạn thông cảm nhé )