60+40=100      30+40=70    60-50=10    500+200=700     700-200=500   700-500=200    300+600=900   900-300=600    900-600=300

= 1000

k nha

bạn

mình k lại cho

20 + 20 + 60 + 100 + 600 + 200 = 1000

k mk nhaTomori Nao

x + 200 = 600 + 400 : 2 + 5

x + 200 = 600 + 200 + 5

x + 200= 800 + 5

x + 200 = 805

       x= 805 - 200

        x = 605

x - 200 = 600

    x= 600 + 200

     x= 800

x+200=600+400:2+5

x+200=600+200+5

x+200=800+5

x+200=805

x=805-200

x=605

x-200=600

x=600+200

x=800

B

B

x+600=200+600

x+600=800

x        =800-600

x        =200

x + 600 = 200 + 600

x + 600 = 800

x          = 800 - 600

x          = 200

a) 810 + 50 = 860

350 + 250 = 600

550 - 500 = 50

b) 600 + 60 = 660

105 + 15 = 120

245 - 45 = 200

c) 200 - 100 = 100

250 - 50 = 200

333 - 222 = 111

x - 200 = 600 + 200

x - 200 = 800

x = 800 + 200

x = 1000

Vậy x = 1000

x=1000

x + 200 = 600 + 200

x + 200 = 800

          x = 800 - 200

          x = 600

tk mk nha mk tk lại

mơn nhìu !!!

thank you very much !!!

x+200=800

x=800-200

x=600

x + 200 = 300 - 600

x + 200 = -300

         x = -300 - 200

         x = -500

x - 200 = 300

       x   = 300 + 200

       x   = 500                              k mk nha~

x+200=-300

x=-300