Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
321 x 3 + 321 x 5 + 321 x 2
= 321 x (3 + 5 + 2)
= 321 x 10
= 3 210.
321 x 3 + 321 x 5 + 321 x 2
= 321 x (3 + 5 + 2)
= 321 x 10
= 3210
x/3 + 15/26 = 46/52
x/13 + 15/26 = 23/26
x/13 = 23/26 - 15/26
x/13 = 4/13
Có x/13 = 4/13
Suy ra : x = 4
Vậy x = 4
\(C,\dfrac{1}{2}.\dfrac{3}{4}+\dfrac{1}{2}.\dfrac{1}{4}=\dfrac{1}{2}.\left(\dfrac{3}{4}+\dfrac{1}{4}\right)\)
\(=\dfrac{1}{2}.\dfrac{4}{4}=\dfrac{1}{2}.1=\dfrac{1}{2}\)
\(D,\dfrac{11}{3}.\dfrac{26}{7}-\dfrac{26}{7}.\dfrac{8}{3}=\dfrac{26}{7}.\left(\dfrac{11}{3}-\dfrac{8}{3}\right)\)
\(=\dfrac{26}{7}.\dfrac{3}{3}=\dfrac{26}{7}.1=\dfrac{26}{7}\)
Ta có: \(26\times8+4\times13-10\times26\)
\(=13\times2\times8+4\times13-10\times2\times13\)
\(=13\times16+4\times13-20\times13\)
\(=13\times\left(16+4-20\right)=13\times0=0\)
\(\dfrac{26}{7}\) x \(\dfrac{11}{3}-\dfrac{26}{7}\) x \(\dfrac{2}{3}-\dfrac{6}{3}\) x \(\dfrac{26}{7}\)
\(=\dfrac{26}{7}\) x \(\left(\dfrac{11}{3}-\dfrac{2}{3}-\dfrac{6}{3}\right)\)
\(=\dfrac{26}{7}\) x \(\dfrac{3}{3}\)
\(=\dfrac{26}{7}\) x \(1=\dfrac{26}{7}\)
26/7 x 11/3 - 26/7 x 2/3 - 6/3 x 26/7
=( 11/3 - 2/3 - 6/3 ) x26/7
= 1 x 26/7
= 26 /7
Tick cho mình nha
26 x 17 + 38 x 26 + 26 x 44 + 26
= 26 x 17 + 38 x 26 + 26 x 44 x 1
= 26 x ( 17 + 38 + 44 + 1 )
= 26 x 100
= 2600
Chúc bạn học tốt !!!
1234 : 12 = 102.3333..
125 x 24 = 3000
26 x 100 + 52 = .2652
hok tốt
26 x 4 + 52 + 3 x 26 + 26
= 104 + 52 + 78 + 26
= ( 52 + 78 ) + ( 104 + 26 )
= 130 + 130
= 260
26 x 4 + 52 + 3 x 26 + 26
= 104 + 52 + 78 + 26
= ( 104 + 26 ) + ( 52 + 78 )
= 130 + 130
= 260
Học tốt nha