-125+(X+125)=-25
X+125=-25+125
X+125=100
X=100-125
X=-25
x+125=-25-(-125)
x+125=100
x=100-125
x=-25
-125+(×+125)=-25
×+125=-25-(-125)
×+125=100
×=100-125
×=-25
-125+(X+125)=-25
X+125=-25+125
X+125=100
X=100-125
X=-25
x+125=-25-(-125)
x+125=100
x=100-125
x=-25
-125+(×+125)=-25
×+125=-25-(-125)
×+125=100
×=100-125
×=-25
8. Bỏ dấu ngoặc rồi tính:
a) ( 17 – 229) + ( 17 - 25 + 229) ; b) ( 125 – 679 + 145) – ( 125 – 679 )
9. Tìm x biết: a) 15 – ( 4 – x) = 6 ; b) - 30 + ( 25 – x) = - 1 ;
c) x – ( 12 – 25) = -8 ; d) ( x – 29 ) – ( 17 – 38 ) = - 9
10. Tìm số nguyên x biết: a) x – 5 = - 1 ; b) x + 30 = - 4; c) x – ( - 24) = 3 ; d) 22 – ( - x ) = 12; e) ( x + 5 ) + ( x – 9 ) = x + 2 ; f) ( 27 – x ) + ( 15 + x ) = x – 24 .
Tính nhanh ( Giải chi tiết hộ mình nhé)
a) 125 x 25 x 64
b) 125 x 25 x 12 x 24
c) 1300 : 50
d) 700 : 25
-125 + (x + 125) = - 25
f) -125 + (x + 125) = - 25
tinh nhanh
4 x 125 x 25 x 8
2 x 8 x 50 x25 x125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
B= 1037 + { 743 - [ 1031 - (+57) ] }
C= ( 125x 73 - 125 x 75): ( -25 x 2)
D= - 25 x ( 35 + 147)+ 35 x ( 25 + 147)
E= 125 x 9x (-4)x (-8) x 25 x 7
G= ( -3)2 + ( - 5)3 : /-5/
Tính hợp lí:
a) 125. ( -24 ) + 24 . 225
b) 24. ( -125 ) - 125. ( -36 )
c) 512. ( 2- 128 ) - 128. ( -512 )
d) ( -8 ). 25 .( -2 ). 4 .( -5 ). 125
C = (125 . 73 - 125 . 75 ) : ( - 25. 2 )
0,6524 + 0,4 x 8 x 125 + 0,3476 / 4 x 8 x 10 x 25 x 125