4545 x 345 x 0 : 1 =
(1999+2978+4545+7956)-(345+598+736+89)
(1999+2978+4545+7956) - (345+598+736+89) = 18556
= (1999+4545+2978+7956)-(345+89+598+736)
= ( 6544+10936 ) - ( 434 + 1334 )
-= 17480 - 1768
= 15712
(345-78-78+98+67+34)+(674+4545+454-888-888)=?
(giúp nha)kết bạn với mình luôn
số do là
4285
đúng thì k nha
mình hêt luotj rùi
ai k mình nhé
Tính :
12 + 45 + 79 + 345 + 299 + 1220032 + 666 = ?
12 x 677 x 999 x 1032 x 0 + 1 = ?
12 + 45 + 79 + 345 + 299 + 1220032 + 666 = 1221478
12 x 677 x 999 x 1032 x 0 + 1 = 1
12 + 45 + 79 + 345 + 299 + 1220032 + 666 = 1221478
12 x 677 x 999 x 1032 x 0 + 1 = 1
**
25. Tính nhanh bằng cách thuận tiện:
345 + 1035 x 5 – 5 x 690 – 345 x 5 + 1000
345 + 1035 x 5 - 5 x 690 - 345 x 5 + 1000
= 345 + ( 1035 - 690 - 345 ) x 5 + 1000
= 345 + 0 x 5 + 1000
= 345 + 0 + 1000
= 1345 Mong câu trả lời của mk giúp ích cho bn( )
4545-3(x-2)=12
\(4545-3\left(x-2\right)=12\\ \Rightarrow3\left(x-2\right)=4533\\ \Rightarrow x-2=1511\\ \Rightarrow x=1513\)
\(4545-3\left(x-2\right)=12\)
\(\Rightarrow3\left(x-2\right)=4545-12\)
\(\Rightarrow3\left(x-2\right)=4533\)
\(\Rightarrow x-2=1511\)
\(\Rightarrow x=1511+2\)
\(\Rightarrow x=1513\)
`4545−3(x−2)=12`
`=>``3(x−2)=4545−12`
`=>x−2=1511`
`=>x=1511+2`
`=>x=1513`
Vậy `x=1513`
1 + 1 + 1 + 1 + 1 + 1+ 1 + 1 + 1 x 0 + 345 = ???
~ Love ~ mọi người trên Online.Math
25. Tính nhanh bằng cách thuận tiện:
345 + 1035 x 5 – 5 x 690 – 345 x 5 + 1000
5x(345+1035+690-345+1000)
=5x 2725
= 13625
HT~
a)234+(345-x)=500
b)456-(x+23)=326
c)(5.x-15):5=0
d)84-4.(2.x+1)=48
e)(x-76).54=0
f)(x-3).(x+4)=0
g)(x-6).(x-7)=0
h)(x-2).(x-3).(x-5)=0
ai nhanh mk tick cho
a) \(234+\left(345-x\right)=500\)
\(345-x=500-234\)
\(345-x=266\)
\(x=79\)
vay \(x=79\)
b) \(456-\left(x+23\right)=326\)
\(x+23=456-326\)
\(x+23=130\)
\(x=107\)
vay \(x=107\)
c) \(\left(5x-15\right):5=0\)
\(5x-15=0\)
\(5x=15\)
\(x=3\)
vay \(x=3\)
d) \(84-4\left(2x+1\right)=48\)
\(8x+4=84-48\)
\(8x+4=36\)
\(8x=32\)
\(x=4\)
vay \(x=4\)
e) \(\left(x-76\right).54=0\)
\(x-76=0\)
\(x=76\)
vay \(x=76\)
f) \(\left(x-3\right)\left(x+4\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-3=0\\x+4=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=3\\x=-4\end{cases}}\)
vay \(\orbr{\begin{cases}x=3\\x=-4\end{cases}}\)
g) \(\left(x-6\right)\left(x-7\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-6=0\\x-7=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=6\\x=7\end{cases}}\)
vay \(\orbr{\begin{cases}x=6\\x=7\end{cases}}\)
h) \(\left(x-2\right)\left(x-3\right)\left(x-5\right)=0\)
\(\Rightarrow x-2=0\Rightarrow x=2\)hoac \(\orbr{\begin{cases}x-3=0\\x-5=0\end{cases}\Rightarrow}\orbr{\begin{cases}x=3\\x=5\end{cases}}\)
vay \(x=2\)hoac \(\orbr{\begin{cases}x=3\\x=5\end{cases}}\)
câu a,b thì chắc bn biết
c)(5.x-15):5=0
(5.x-15) =0.5
(5.x-15) =0
5.x =0+15
5.x =15
x =15:5
x =3
d)84-4.(2.x+1)=48
4.(2.x+1)=84-48
4.(2.x+1)=36
2.x+1 =36:4
2.x+1 =9
2.x =9-1
2.x =8
x =8:2
x =4
e)(x-76).54=0
x-76 =0:54
x-76 =0
x =0+76
x =76
f) (x-3).(x+4)=0
\(\Rightarrow\orbr{\begin{cases}x-3=0\\x+4=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=3\\x=-4\end{cases}}\)
Vậy x=3 hoặc x=-4
câu g,h làm tương tự
a) (314 - x)-42=0
b) 540 + (345-x)=740
c) (x - 72) : 36=418
d)2010 * (x-14)=0
e) (x-2)*(x-4)=0
f) 114-(x-47)=0
g) 7272 : (120x -91)=12
a) \(\left(314-x\right)-42=0\)
\(314-x=42\)
\(x=272\)
vay \(x=272\)
b) \(540+\left(345-x\right)=740\)
\(345-x=200\)
\(x=145\)
vay \(x=145\)
c) \(\left(x-72\right):36=418\)
\(x-72=15048\)
\(x=15120\)
vay \(x=15120\)
d) \(2010\left(x-14\right)=0\)
\(x-14=0\)
\(x=14\)
vay \(x=14\)
e) \(\left(x-2\right)\left(x-4\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-2=0\\x-4=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=2\\x=4\end{cases}}\)
vay \(\orbr{\begin{cases}x=2\\x=4\end{cases}}\)
f) \(114-\left(x-47\right)=0\)
\(x-47=114\)
\(x=161\)
vay \(x=161\)
g) \(7272:\left(120x-91\right)=12\)
\(120x-91=606\)
\(120x=697\)
\(x=\frac{697}{120}\)
vay \(x=\frac{697}{120}\)
Despacito đã có dấu'' x= '' thì ko cần kết luận là '' vậy''
a, ( 314 - x ) - 42 = 0
( 314 - x ) = 0 + 42
( 314 - x ) = 42
x = 314 - 42
x = 272
b, 540 + ( 345 - x ) = 740
( 345 - x ) = 740 - 540
( 345 - x ) = 200
x = 345 - 200
x = 145
c, ( x - 72 ) : 36 = 418
( x - 72 ) = 418 x 36
( x - 72 ) = 15 048
x = 15 048 + 72
x = 15 120
k mk nha