\(=\left(214328+12345\right)\cdot1=226673\)

ok đúng/

=(367 x 584 + 12345) x (10 - 10)

= (367 x 584 + 12345) x 0

=0

=(367 x 584 + 12345) x (10 - 10)

=(367 x584 + 12345) x 0

=0

= 0 nha!

HOK TỐT :D

= 12345 x ( 3 + 2 + 4 )

= 12345 x 10

=123450

A = 12345 x 3 + 12345 x 2 + 12345 + 12345 x 4

A = 12345 x 3 + 12345 x 2 + 12345 x 1 + 12345 x 4

A = 12345 x (3 + 2 + 1 + 4)

A = 12345 x 10

A =  123450

a: \(\dfrac{12345\cdot98765-86420}{12345+12344\cdot98765}\)

\(=\dfrac{12344\cdot98765+98765-86420}{12345+12344\cdot98765}\)

\(=\dfrac{12344\cdot98765+12345}{12345+12344\cdot98765}=1\)

12345 x 17 + 23 x 12345 + 12345 + 12345 x 35 + 12345 x 24

12345 x ( 17 + 23 + 35 + 24 )

12345 x 99

1222155

= 12345 x 17 + 23 x 12345 + 12345 x 1 + 12345 x 35 + 12345 x 24

= 12345 x ( 17 + 23 + 1 + 35 + 24 )

= 12345 x 100

= 1234500

Bài 13 : Tìm x 

30240 : x = 42

            x = 30240 : 42 

            x = 720

X x 12 = 2412

        X = 2412 : 12

        X = 201

57316 : ( X - 8 ) = 623

                X - 8 =  57316 : 623 

                X - 8 = 92

                     X = 92 + 8 

                     X = 100

( X + 3 ) x 247 = 10755

              X + 3 = 10755 : 247

              X + 3 = 10755/247

                    X = 10755/247 - 3 

                    X = 10014/247

X x 37 = 1135

       X = 1135 : 37

       X = 1135/37

25 x X = 9100

       X = 9100 : 25

       X = 364

Bài 13
1.720  2.201   3.100   4.162   5. 1135/37   6.364

bài 14
( 367*584+12345 ) * ( 3570: 357 - 10)
= ( 367*584+ 12345 ) * ( 10-10 )
= ( 367*584+12345 ) * 0
= 0
 

123456 x 12345 

=12345²

=152399025

tính bằng cách thuận tiện nhất thì mk ko biết

hok tốt .

    (367*584+12345)*(3570:357-10)

=(367*584+12345)*(10-10)

=(367*584+12345)*0

=0

cau 1

189

cau 2

30240 : x =42

           x= 30240:42

            x=720