\(123.456+456.321-256.444=456.\left(123+321\right)-256.444=456.444-256.444=444.\left(456-256\right)=444.200=88800\)

123.456+456.321-256.444

=456.(123+321)-256.444

=456.444-256.444

=444.(456-256)

=444.200

=88800

\(123\cdot456+456\cdot321-256\cdot444\)

\(=456\left(123+321\right)-256\cdot444\)

\(=456\cdot444-256\cdot444\)

\(=444\left(456-256\right)\)

\(=444\cdot200\)

=88800

\(123\cdot456+456\cdot321-256\cdot444\)

\(=\left(123+321\right)\cdot456-256\cdot444\)

\(=444\cdot456-256\cdot444\)

\(=444\cdot\left(456-256\right)\)

\(=444\cdot200\)

\(=88800\)

là 88800

hok tốt

                      Bài làm :

123 x 456 + 456 x 321 - 256 x 444 = 56088 + 146376 - 113664

                                                        = 88800

                       Đ/S : 88800 

Ta có: \(123\times456+456\times321-256\times444\)

           \(=444\times456-256\times444\)

           \(=444\times\left(456-256\right)\)

            \(=444\times200\)

            \(=444\times200=88800\)

123x456+456x321+256x444

=456x(123+321)+256x444

=456x444+256x444

=444x(456+256)

=444x712

=316128

Chúc bạn học giỏi nha!!!

=456*(123+321)+256*444=444*(256+456)=316128

123 x 456 x 321 + 256 x 444

= 456 x ( 123 + 321 ) 256 x 444

= 456 x 444 + 256 x 444

= 444 x ( 456 + 256 )

= 444 x 712

= 316128

\(37\times7+80\times3+34\times7\)

\(=7\times\left(37+34\right)+80\times3\)

\(=7\times71+240\)

\(=497+240\)

\(=737\)

a)

37 x 7 + 80 x 3 + 34 x 7

= 7 x (37 + 34) + 80 x 3

= 7 x 71 + 240

= 497+ 240 

= 737

b)

123 x 456 + 456 x 321 - 256 x 444

= 456 x (123 + 321) - 256 x 444

= 456 x 444 - 256 x 444

= 444 x (456 - 256)

= 444 x 200

= 88800

k mk nhé ^^

de minh giup ban. bai do lam the nay

123 x 456 + 228 x 642 - 256 x 444

=56088 + 146376 - 113664

=202464 -113664

=88800

   neu sai cac ban nho sua cho minh, neu dung thi cac ban h cho to nhe

123 x 456 + 228 x 642 - 256 x 444 = 88800 (Nhớ clik cho tớ với nhá!)

minh klich cho bạn rồi đấy

321 + 456 - 234 = 543

543 - 123 + 456 = 876

234 + 234 - 321 = 147

a) a)321+456-234= 543

b)543-123+456=876

c)321+234-321=234

a)543

b)876

c)147

-42528

#giải:

125 . 456 + 456 . 31 - 256 . 444

= 456 . ( 125 + 31 ) - 256 . 444

= 456 . 256 - 256 . 444

= 256 . ( 456 - 444 )

= 256 . 12

= 3072

         #By_Ami 

Bạch Dương trả lời sai rồi