vì các số trên đều là tổng của những số hạng bằng nhau

600 nha !

mik rất thích bài hát "Chưa bao giờ mẹ kể"

k mik nhé

2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 + 30 + 32 + 34 + 36 + 38 + 40 + 42 + 44 + 46 + 48 = 600

k em nha

26+17+23+14=80

46+82+18+54=200

56-3+53-6=100

HỌC TỐT

sai rồi phải mở ngoạc chứ sai rùi đó

a)

\(x-28=22\)

\(x=22+28\)

\(x=50\)

b)

\(x-55=16\)

\(x=16+55\)

\(x=71\)

c)

\(x-26=46\)

\(x=46+26\)

\(x=72\)

d)

\(x-33=18\)

\(x=18+33\)

\(x=51\)

e)

\(x-38=44\)

\(x=44+38\)

\(x=82\)

g)

\(x-5=57\)

\(x=57+5\)

\(x=62\)

a) = 50

b) = 71

c) = 72  

d) = 51 

e) = 82

g) = 62

k cho mk nha

\(\begin{array}{*{20}{c}}{a)\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{25}\\{39}\end{array}}\\\hline{\,\,\,64}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{46}\\{46}\end{array}}\\\hline{\,\,\,92}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{64}\\{26}\end{array}}\\\hline{\,\,\,90}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{75}\\{15}\end{array}}\\\hline{\,\,\,90}\end{array}\)

\(\begin{array}{*{20}{c}}{b)\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{17}\\{\,7}\end{array}}\\\hline{\,\,\,24}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{89}\\{\,\,2}\end{array}}\\\hline{\,\,\,91}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{58}\\{\,\,\,2}\end{array}}\\\hline{\,\,\,60}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{67}\\{\,\,3}\end{array}}\\\hline{\,\,\,70}\end{array}\)

23 + 46 = 69

23 + 46 = 69 nhaAMZ

300

465 

x+46=79

x=79-46

x=33

46+x=47

x=47-46

x=1

x=32; x=1