Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\dfrac{11}{34}+\dfrac{5}{23}+\dfrac{23}{34}+\dfrac{18}{23}\)
\(=\left(\dfrac{11}{34}+\dfrac{23}{34}\right)+\left(\dfrac{5}{23}+\dfrac{18}{23}\right)\)
\(=1+1\)
\(=2\)
#DatNe
\(\frac{19}{15}+\frac{31}{23}-\frac{4}{15}-\frac{8}{23}=\frac{19-4}{15}+\frac{31-8}{23}=\frac{15}{15}+\frac{23}{23}=1+1=2\)
\(\frac{19}{15}+\frac{31}{23}-\frac{4}{15}-\frac{8}{23}\)
\(=\frac{19-4}{15}+\frac{31-8}{23}\)
\(=\frac{15}{15}+\frac{23}{23}\)
\(=1+1=2\)
TL
\(\frac{7}{8}\)+\(\frac{4}{23}\)+\(\frac{42}{23}\)=\(\frac{7}{8}+2\)=\(\frac{23}{8}\)
nha bn
HT
\(TL:\)
\(\frac{7}{8}+\frac{4}{23}+\frac{42}{23}\)
\(=\frac{7}{8}+\left(\frac{4}{23}+\frac{42}{23}\right)\)
\(=\frac{7}{8}+\frac{46}{23}\)
\(=\frac{7}{8}+2\)
\(=\frac{7}{8}+\frac{16}{8}\)
\(=\frac{23}{8}\)
\(=2\frac{7}{8}\)
\(HT!\)
TL:
\(\text{567 x 23 + 433 x 23}\)
\(=\left(567+433\right) x 23\)
\(=1000x 23\)
\(=23000\)
HT
a) 23*45 -23*35+23*90
= 23* (45-35+90)
= 23*100
= 2300
b) 636/ 6 - 36/ 6
= 600/ 6
= 100
c) 11*607 -607
= 11*607 -607*1
= 607* (11 -1)
= 607*10
= 6070
34 x 23 + 56 x 23 = 23 x (34 + 56) = 23 x 90 = 2070
409 x 34 + 124 x 34 = 34 x (409 + 124) = 34 x 533 = 18122
* là gì vậy?
23 * 56 + 230 + 23 * 34
= 23 * 56 + 23 * 10 + 23 * 34
= 23 * ( 56 + 10 + 34 )
=23 * 100
= 2300
nha