Phần típ theo nè!
Câu 5: Tìm \(x\):
Đề bài : \(xxx\) - \(x
\) x 105 = 30
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 6: Tìm \(x \):
a) \(x \) x 7 + \(x\) = 384.
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
b) \( x\)\(x
\) - \(x\) x 2 = 378.
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 7: Tìm số tự nhiên ab biết ab x 9 = 2ab :
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 8: Viết biểu thức sau thành tích 2 thừa số:
Đề bài: ab + ab x 2 + ab x 4 + ab =
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
-------- Còn nữa -------
57,707
\(x-18,045=47,212-6,55\)
\(x-18,045=40,662\)
\(x=40,662+18,045\)
\(x=58,707\)
\(47,212-\left(x-18,045\right)=6,55\)
\(x-18,045=47,212-6,55\)
\(x-18,045=40,662\)
\(x=40,662+18,045\)
\(x=58,707\)
\(47,212 - (x - 18,045) = 6,55\)
\(x-18,045 =47,212 - 6,55\)
\(x=40,662+18,045\)
\(x=58,51\)
vậy \(x=58,51\)
sai rồi nhỉ ?
x - 18,045 = 47,212 - 6,55
x - 18,045 = 40,662
x = 40,662 + 18,045
x = 58,707
đúng mà bn
bn sai thì có á
bn sai thì có á
lp 8 thế này hơi điêu !!!
=)))
hở
ý bn là sao
tính lại đê
?
ủa
đúng mà
a!
tui xin lỗi
tui tính là 58,707 mà nó lại thành 57 đó
tui gõ lôn mè
??? đúng , sai còn ko nhận
hè
lúc đó chx nhận ra
tui xuống ngay nè