29 * ( 36 + x ) = 2378 ; 61 * ( 162 : x ) = 2562
tính bằng cách thuận tiện nhất
36 * ( 2378 - 726 ) + 64 * 1652=
=36 x 1652 + 64 x 1652
=1652 x (36+64)
=1652 x 100
=165200
X-108x42=2378
X - 108 x 42 = 2378 X - 4536 = 2378 X = 2378 + 4536 X = 6914
Bài 1 Bỏ ngoặc rồi tính
b) (3965-2378-2378)-(437-1378)-528
Lời giải:
$=3965-2378-2378-437+1378-528$
$=3965-(2378-1378)-2378-437-528$
$=3965-1000-2378-437-528$
$=2965-(2378+437+528)=2965-3343=-378$
Đúng / Sai
59+64=36+64+59 ..............
129+157-29=129-29+157 ............
129+157-29 = 157+ 129-29 ...........
4+16 x 25 = 16 + 4 x 25 .............
21 + 49 : 7 = 49 + 21 : .................
(36 + 45 ) : 9 = (45+36 ) :9 .............
59 + 64 = 36 + 63 + 59 _Sai_
129 + 157 - 29 =129 - 29 + 157 _Đúng_
129 + 157 - 29 = 157 + 129 - 29 _Đúng_
4 +16 x 25 = 16 + 4 x 25 _Sai_
21 + 49 : 7 = 49 + 21 : 7 _Sai_
(36 + 45 ) : 9 = (45+36 ) : 9 _Đúng_
(Cái này tính nhẩm là ra thôi bạn ạ! Đúng cho mình 1 tick nhé bạn!)
a,x-108×42=2378
b,1337+13×x=6745
c,x×10+16×x=972
d,25×x-x=59904:32
Tìm x: (3.x + 11) – 17 = 30
a,x-108×42=2378
b,1337+13×x=6745
c,x×10+16×x=972
d,25×x-x=59904:32
a, x - 108 × 42 = 2378
=> x - 4536 = 2378
=> x = 6914
vậy_
b,1337 + 13 × x = 6745
=> 10 × x = 5408
=> x = 540,8
vậy_
c, x × 10 + 16 × x = 972
=> x × (10 + 16) = 972
=> x× 26 = 972
=> x = \(\frac{486}{13}\)
vậy_
d, 25 × x - x = 59904 : 32
=> x × (25 - 1) = 1872
=> x × 24 = 1872
=> x = 78
vậy_
\(x-108.42=2378\)
\(x-4536=2378\)
\(x=6914\)
Tính nhanh
(3965-2378)-(437-1378)-528
Tính
(-x+31)-39=-69+11
(3965-2378)-(437-1378)-528
=3965-2378-437-1378-528
=(3965-(437+528))-(2378-1378)
=3000-1000
=2000
Bài 1 :
\((3965-2378)-(437-1378)-528\)
\(=3965-2378-437+1378-528\)
\(=3965-(2378-1378)-(437+528)\)
\(=3965-1000-965\)
\(=(3965-965)-1000\)
\(=3000-1000\)
\(=2000\)
Bài 2 :
\((-x+31)-39=-69+11\)
\((-x+31)-39=-58\)
\(-x+31=-58+39\)
\(-x+31=-19\)
\(-x=-19-31\)
\(-x=-50\)
\(=>x=50\)
(-x+31)-39=-69+11
(-x+31)-39=-58
-x+31 =-58+39
-x+31 =-19
-x =-19-31
-x =-50
5x-x=29-36/4
5x - x = 29 - \(\frac{36}{4}\)
5x - x = 29 - 9
5x - x = 20
4x = 20
x = 20 : 4
x = 5
Ai thấy đúng cho mk nhé
5x-x=29-36/4
=>x*(5-1)=29-9
=>x*4=20
=>x=20:4
=>x=5
5x−x=29−36:4
5x-x=29-9
5x-1x=25
(5-1)x=25
4x=25
x=25:4
x=6,25
5x - x = 29 - 36 : 4
5x - x = 29 - 9
5x - 1x = 20
(5 - 1)x = 20
4x = 20
x = 20 : 4 = 5