Tính nhanh
57 x 76 + 13 x 57 + 11 x 57
Tìm x biết :
A) x + 13 = 32 - 76
B) (-15) + x = (-14) - (-57)
\(x+13=32-76\)
\(\Leftrightarrow x+13=-44\)
\(\Leftrightarrow x=-44-13\)
\(\Leftrightarrow x=-57\)
\(-15+x=-14-\left(-57\right)\)
\(\Leftrightarrow-15+x=-14+57\)
\(\Leftrightarrow-15+x=43\)
\(\Leftrightarrow x=43+15=58\)
A) x + 13 = 32 - 76
x + 13= -44
x = (-44) - 13
x = -57
Vậy x = -57
B) (-15) + x = (-14) - (-57)
(-15) + x = (-14) + 57
(-15) + x = 43
x = 43 + (-15)
x = 43 - 15
x = 28
Vậy x = 18
=))
Tìm x, biet
a)x+13=32-76
b)(-15)+x=(-14)-(-57)
a) x+13 = 32 -76
x+13 = -44
x = -44 -13
x = -57
=> x = -57
b) (-15)+x = (-14)-(-57)
(-15) +x = 43
x = 43 -(-15)
x =58
=> x = 58
tic nhé
a) x+13=32-76
x+13=-44
x=(-44)-13
x=-57
b)(-15)+x=(-14)-(-57)
(-15)+x=43
x=43-(-15)
x=58
Tính nhanh:
a)11/7 x 8/13 + 8/13 x 3/7 + 8/13
b)5/7 x 8/13 + 8/13 x 9/7 - 8/13
c)156 x 199 - 57 x 199 - 199
a.11/7.8/13+8/13.3/7+8/13
=8/13.(11/7+3/7+1)
=8/13.3
=24/13
b.5/7.8/13+8/13.9/7-8/13
=8/13.(5/7+9/7-1)
=8/13.1
=8/13
c.157.199-56.199-199
=199.(157-56-1)
=199.100
19900
tính tổng các biểu thức sau :
a) A= ( 157 x 57 - 99 x 57 - 572) : 57 + 57
b) B= [ 160 x ( 730 - 700 ) : 24 - 42 ] x 13
c) C= (32 x 17 + 32 x 38 - 55 ) : ( 23 x 68 - 23 x 13 )
x/36 = 76/57
Tìm x
X/36 = 76/57
=> X = 36x76/57
=> X = 48
tìm x : x/36=76/57
Tìm x : x /36 = 76/57
57 x 12 + 57 x 13 + 57 x 16
57 x 12 + 57 x 13 + 57 x 16
= 57 x (12 + 13 + 16)
= 57 x 41
= 2337
57 x 12 + 57 x 13 + 57 x 16
= 57 x (12 + 13 + 16)
= 57 x 31
= 1767
57 x 12 + 57 x 13 + 57 x 16
= 57 x ( 12 + 13 + 16 )
= 57 x 41
= 2337
57 x 12 + 57 x 13 + 57 x 16
Tính
x= 38/7x13 + 57/13x22+95/22x37+76/37x49