25.35.4
=25.4.35
=100.35
=3500
5.15.2
=5.2.15
=10.15
=150
x-9=0
x=0+9
x=9
x+10=10
x=10-10
x=0
25. 35 . 4 = ( 25 . 4 ) .35 = 100 . 35 = 3500
5 . 15 . 2 = ( 5 . 2 ) . 15 = 10 . 15= 150
Bài 2 :
x - 9 = 0 => x = 0 + 9 => x = 9. Vậy x = 9
x + 10 = 10 => x = 10 - 10 => x = 0. Vậy x = 0
25.35.4
=(25.4).35
=100.35
=3500
5.15.2
=(5.2).15
=10.15
=150
x-9=0
=>x=0+9
=>x=9
x+10=10
=>x=10-10
=>x=0
25 . 35 . 4
= ( 25 . 4 ) . 35
= 100 . 35
= 3500
5 . 15 . 2
= ( 5 . 2 ) . 15
= 10 . 15
= 150
2) tìm x :
x - 9 = 0
x = 0 + 9
x = 9
x + 10 = 10
x = 10 - 10
x = 0
câu 1 :
\(25.35.4=\left(25.4\right).35=100.35=3500\)
\(5.15.2=\left(5.2\right).15=10.15=150\)
câu 2 :
\(x-9=0\) \(x+10=10\)
\(x=0+9\) \(x=10-10\)
\(x=9\) \(x=0\)
1.
25.35.4
=25.4 .35
=100.35
=3500
5.15.2
=5.2.15
=10.15
=150
2.
x-9=0
x=0+9
x=9
x+10=10
x=10-10
x=0