( 1259 - x 3 ) : 5 = 55
(1259 - y x 3) :5= 55
(1259 - 3y) : 5 = 55
=> 1259 - 3y = 275
=> 3y = 984
=> y = 328
( 1259 - y x 3 ) : 5 = 55
1259 - y x 3 = 55 x 5
1259 - y x 3 = 275
y x 3 = 1259 - 275
y x 3 = 984
y = 984 : 3
y = 328
1259 - y x 3 = 55 x 5 = 275
y x 3 = 1259 - 275 = 984
y = 984 : 3
y = 328
(1259 - y x3 ) : 5 = 55
( 1259 - y x 3 ) : 5 = 55
1259 - y x 3 = 55 x 5
1259 - y x 3 = 275
y x 3 = 1259 - 275
y x 3 = 984
y = 984 : 3
y = 328
vậy y = 328
tick nha bạn
( x + 1259 ) x 5 = 67845
( x + 1259 ) x 5 = 67845
( x + 1259 ) = 67845 : 5
( x + 1259 ) = 13569
x = 13569 - 1259
x = 12310
Mình nghĩ đề bài sai bạn ạ
tk nhé
ai k mình mình k lại
(x+1259)x5=12345+45691
(x+1259)x5=58036
x+1259 =58036:5
x+1259 =11607,2
x=11607,2-1259
x=10348,2
Bài 2: Tính nhanh
a) (35-815)-(795-65)
b) 5-197-2015-2015
c) 1259-1409-12+1259+1409
d) -5+(-37)-45+151-37+151
e) 53-145-359-53+145-259
\(a.\left(35-815\right)-\left(795-65\right)\\ =35-815-795+65\\ =\left(35+65\right)-\left(815+795\right)\\ =100-1610=-1510\)
Bài 2:
a: Ta có: \(\left(35-815\right)-\left(795-65\right)\)
\(=35-815-795+65\)
\(=100-1600\)
=-1500
b: Ta có: \(5-197-2015-2015\)
\(=-2010-2212\)
=-4222
c: Ta có: \(1259-1409-12+1259+1409\)
\(=2518-12\)
=2506
1259+x=3457
1259 + x = 3457
x = 3457 - 1259
x = 2198
12 + 34 + 56 + 78 + 123 + 99 + 322 + 199 = ?
12 x 45 x 67 x 89 x 0 = ?
12 : 4 : 3 x 9 : 3 x 1259 = ?
12 + 34 + 56 + 78 + 123 + 99 + 322 + 199 = 1223
12 x 45 x 67 x 89 x 0 = 0
12 : 4 : 3 x 9 : 3 x 1259 = 3777
Tk nha
tìm x:
x+125+159=1259
x+125+159=1259
=> x=1259-159-125
=>x=975
X + 125 + 159 = 1259
X + 125 = 1259 - 159
X + 125 = 1100
X = 1100 - 125
X = 975
compare 2512...1259
2512=(52)12=52.12=524
1259=(53)9=53.9=527
ta có 527>524
=>1259>2512
Ta có :
\(25^{12}=\left(5^2\right)^{12}=5^{24}\)
\(125^9=\left(5^3\right)^9=5^{27}\)
=> 25^12 < 125^9
~ HT ~
bài 59 thực hiện phép tính
b) (930 - 2719 ) : 3 57 + (1259 - 2512) : 524
c) (1012 + 511 .29 -513 .28 ) : 4.55 . 106