-96 : 2 - x = - (32 - x) -12
cho biểu thức với m = 6,44 phẩy 8 x 1230 + 6 x 4567 x 8 + 531 x 240 x 2 phần 12 x x 8 + 16 x m x 6 + 24 x m x 4 + 32 x m x 3 + 32 x m x 3 + m x 96
Tính nhanh:
8 x 12 x 32 + 4 x 27 x 24 + 96 x 41/16 x 48 - 48 x 9 + 4 x 3 x 12.
A = \(\dfrac{8\times12\times32+4\times27\times24+96\times41}{16\times48-48\times9+4\times3\times12}\)
A = \(\dfrac{96\times32+96\times27+96\times41}{16\times48-48\times9+48\times3}\)
A = \(\dfrac{96\times\left(32+27+41\right)}{48\times\left(16-9+3\right)}\)
A = \(\dfrac{96\times100}{48\times10}\)
A = \(\dfrac{20}{1}\) \(\times\) \(\dfrac{48\times10}{48\times10}\)
A = 20
Điền Đ hoặc S
a) 96 : 4 x 2 = 24 x 2 = 48
b) 96 : 4 x 2 = 96 : 8 = 12
c) 96 : (4 x 2 ) = 96 : 8 = 12
Tìm x, biết
a) 21x = 63;
b) 32. |x| = 96;
c) 11x + 5 = 60;
d) 2 . |x| + 5 = 32 - 13.
a) x = 3.
b) x Î {-3; 3}.
c) x = 5.
d) x Î {-7; 7).
Tìm x, biết a) 21x = 63; b) 32. x = 96 c) 11x + 5 = 60 d) 2 . x + 5 = 32 - 13
12 - 3 = ? + 96 = ? + 10 + 1 + ?
100 - 55 = ?
12 ? 3 = 4 x 4 = ?
99 : 3 = ?
78 + 32 = ?
12-3=9+96=105+10+1=116
100 - 55=45
12:3=4 *4=16
99 :3=33
78+32=110
Điền Đ, S
a. 96 : 4 x 2 = 24 x 2
= 48
b. 96 : 4 x 2 = 96 : 8
= 12
Tính theo mẫu :
32 dam x 3 = 96dam
25 m x 2 =
15 km x 4 =
34 cm x 6 =
96 cam : 3 = 32 cm.
36 hm : 3 =
70 km : 7 =
55 dm : 5 =
25 m x 2 = 50 m
15 km x 4 = 60 km
34 cm x 6 = 204 cm
36 hm : 3 = 12 hm
70 km : 7 = 10 km
55 dm : 5 = 11dm
25m x2 =50 m
15km x4 =60 km
34 cm x6= 204cm
96cm :3 =32 cm
36hm :3 =12 hm
70km :7 =10 km
55dm :5 =11 dm
96/x^2-16+7+x/4-x=2x-1/x+4-3
2/x-1 +3/x-2 =3/x-3
1/x+1+5-x/x-2=3/x^2-x-2-1
a: \(\dfrac{96}{\left(x-4\right)\left(x+4\right)}+\dfrac{7+x}{4-x}=\dfrac{2x-1}{x+4}-3\)
\(\Leftrightarrow\dfrac{96}{\left(x-4\right)\left(x+4\right)}-\dfrac{\left(x+7\right)\left(x+4\right)}{\left(x-4\right)\left(x+4\right)}=\dfrac{\left(2x-1\right)\left(x-4\right)}{\left(x+4\right)\left(x-4\right)}-\dfrac{3\left(x-4\right)\left(x+4\right)}{\left(x-4\right)\left(x+4\right)}\)
Suy ra: \(96-x^2-11x-28=2x^2-9x+4-3\left(x^2-16\right)\)
\(\Leftrightarrow-x^2-11x+68=2x^2-9x+4-3x^2+48\)
\(\Leftrightarrow-x^2-11x+68=-x^2-9x+52\)
=>-11x+68=-9x+52
=>-2x=-16
hay x=8(nhận)
b: \(\dfrac{2}{x-1}+\dfrac{3}{x-2}=\dfrac{3}{x-3}\)
\(\Leftrightarrow2\left(x-2\right)\left(x-3\right)+3\left(x-1\right)\left(x-3\right)=3\left(x-1\right)\left(x-2\right)\)
\(\Leftrightarrow2\left(x^2-5x+6\right)+3\left(x^2-4x+3\right)=3\left(x^2-3x+2\right)\)
\(\Leftrightarrow2x^2-10x+12+3x^2-12x+9=3x^2-9x+6\)
\(\Leftrightarrow5x^2-22x+21-3x^2+9x-6=0\)
\(\Leftrightarrow2x^2-13x+15=0\)
\(\Leftrightarrow2x^2-10x-3x+15=0\)
=>(x-5)(2x-3)=0
=>x=5(nhận) hoặc x=3/2(nhận)