a) (370 + 12) : 2 = 382 : 2

                  = 191

370 + 12 : 2 = 370 + 6

                  = 376

b) (231 – 100) x 2 = 131 x 2

                   = 262

231 – 100 x 2 = 231 – 200

                   = 31

c) 14 x 6 : 2 = 84 : 2

                   = 42

14 x (6 : 2) = 14 x 3

                  = 42

d) 900 – 200 – 100 = 700 – 100

                   = 600

900 – (200 – 100) = 900 – 100

                   = 800

`a, 1000 : 100 = 10`

`b, 75 xx 100 = 7500`

`c, 900 xx 10 = 9000`

`d, 8 xx 100 : 10 : 10 xx 10000 = 80000`

\(a,1000:100=10\\ b,75\times100=7500\\ c,900\times10=9000\\ d,8\times100:10:10\times10000\\ =800:10:10\times10000=8\times10000=80000\)

a)\(1000:100=10\)
b)\(75\times100=7500\)

c)\(900\times10=9000\)

d)\(8\times100:10:10\times10000=8\times10000=80000\)

x=800

x=100

k mik nha bn âm sắp -400 ùi

x + 100 = 900

x = 900 - 100

x = 800

900 + x = 1000

x = 1000 - 900

x = 100

x+100=900

        x=900-100

        x=800

900+x=1000

        x=1000-900

        x=100

Chúc bạn học giỏi và gặp nhiều điều may mắn!!!

x+100=900+100

x+100=1000

x=1000-100

x=900

x + 100 = 900 + 100

x + 100 = 1000

x           = 1000 - 100

x           = 9000

tk mk mk tk lại

x là 900

x + 100 = 900 + 100

x + 100 = 1000

x = 1000 - 100

x = 900 

x+100=1000

x=1000-100

x=900

ai tk minh minh tk lai

x + 100 = 1000

x = 1000 - 100

x = 900

x+900=900+100

x+900=1000

x       = 100

vậy x=100.

x=100

x = 100

k mk nha~

x - 100 = 200 + 900

x - 100 = 1100

x         = 1100 + 100

x         = 1200

x + 100 = 300 - 400

x + 100 = - 100

x          = - 100 - 100

x          = - 200

x+100=200+900

x+100=1000

x=1000-100

x=900

x+100=300-400

x+100=-100

x=-100-100

x=-200

X-100=200+900

X-100=1100

X       =1100+100

X       =1200

100 + x = 900 + 100

100 + x = 1000

x = 1000 - 100

x = 900

Vậy x = 900

100+x=900+100

100+x=1000

       x=1000-100

       x=900

tk nha thanks nhìu

100+x=900+100

100+x=1000

x=1000-100

x=900

X= 100 nha

k mk nha

mk k lại cho!

900 + 100 + x = 900 + 200

  1000        + x =   1100

                    x = 1100 - 1000

                    x =     100

900 + 100 + x = 900 + 200

  1000        + x =   1100

                    x = 1100 - 1000

                    x =     100