a)68x(y:35)=1156

⇔ y:35=1156:68

⇔ y:35= 17

⇔ y = 17 x 35

⇔ y = 595

b) 111315:(Y x 123)=181(k chia hết)

⇔ y x 123=  

68 x ( x : 35 ) = 1156

X : 35 = 1156 : 68

X : 35 = 17

X = 17 x 35

X = 595

$111315:(x\times 123)=181$

$x\times 123=111315:181$

$x\times 123=615$

$x=615:123$

$x=5$

Vậy $x=5$

$68\times (x:35)=1156$

$x:35=1156:68$

$x:35=17$

$x=17\times 35$

$x=595$

b)

$111315:(x\times 123)=181$

$x\times 123=111315:181$

$x\times 123=615$

$x=615:123$

$x=5$

Vậy $x=5$

a)873 x (50-1) = 873 x 50 - 873 x1 = 43650- 873= 42 777

b) 225 x (100-1)= 22500 - 225= 21 275

c) 572 x (60+ 5) = 572 x 60 + 572 x 5= 34 320 + 2860 = 37 180

\(4689+34545:35x68=4689+987x68\)

                                                                               \(=4689+67116\)

                                                                               \(=71805\)

\(\)các bạn cho mk vài ****

=4689+987x68

=4689+67116

=71805

a) 9 995; 9 996; 9 997; 9 998 ; 9 999 ; 10 000; 10 001; 10 002; 10 003

b) 35 760; 35 770; 35 780; 35 790; 35 800; 35 810; 35 820; 35 830

c) 68 400; 68 500; 68 600; 68 700; 68 800; 68 900; 69 000; 69 100

a. x = 11424

b. x = 2380 

c. x = 8

d. x = 23

3 ( x + 2 ) = 68 - 35

3 ( x + 2 ) = 33

x + 2 = 33 : 3

x + 2 = 11

x = 11 - 2

z = 9 

de the ma k bit lam

hahaha

68 - 3 ( x + 2 ) = 35

3 ( x + 2 )        = 68 - 35

3 ( x + 2 )        = 33

x + 2               = 11

x                     = 9

\(A=\frac{18\times123+9\times567\times2+3\times310\times6}{25\times1,8\times4}\)

\(A=\frac{18\times123+9\times2\times567+3\times6\times310}{25\times4\times1,8}\)

\(A=\frac{18\times123+18\times567+18\times310}{100\times1,8}\)

\(A=\frac{18\times\left(123+567+310\right)}{180}\)

\(A=\frac{18\times1000}{180}\)

\(A=\frac{18000}{180}\)

\(A=100\)

1156 năm = 11 thế kỉ 56 năm

35 + 68 = 103

4 x 8 + 4 x 2 = 40

225 + 445  = 670

Xog !

35 + 68 = 103

4 x 8 + 4x 2

= 4 x( 8+2)

= 4 x 10

=40

225+445=670

35+68=103

4 x 8 + 4 x 2 =40

225+445=670

nho h nho