800 - x = 200 + 100
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100 + x = 200 + 800
100 + x = 1000
x = 1000 - 100
x = 900
kết bạn nhé
x + 200 + 100 = 800 + 200
x + 200 + 100 = 1000
x + 200 = 1000 - 100
x + 200 = 900
x = 900 - 200
x = 700
100+100+200+200+300+300+400+400+500+500+600+600+700+700+800 = 6400
x+100=200-500 x+800=1000
x+100=-300 x =1000-800
x =(-300)-100 x =200
x =(-300)+(-100)
x =-400
x+100=200-500
x+100=-300
x=-300+100
x=-200
x+800=1000
x=1000-800
x=200
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\(=\left(100+900\right)+\left(800+200\right)+...+\left(900+100\right)\)(9 cặp)
\(=1000+1000+...+1000\)(9 số 1000)
\(=1000\times9\)
\(=9000\)
k mình nha
x + 100 = 50 x 2 + 100 - 100 + 200 - 800 + 1 000
x + 100 = 100 + 100 - 100 + 200 - 800 + 1 000
x + 100 = 100 + 200 - 800 + 1 000
x + 100 = ( -500) + 1 000
x + 100 = 500
x = 500 - 100
x = 400.
x+100=50.2+100-100+200-800+1000
x+100=100+100-100+200-800+1000
x+100=200-100+200-800+1000
x+100=100+200-800+1000
x+100=300-800+1000
x+100=-500+1000
x+100=500
x=500-100
x=400
a) 200 mm + 100 mm = 300 mm 300 mm – 100 mm = 200 mm |
200 mm x 3 = 600 mm 600 mm : 3 = 200 mm |
b) 300 g + 200 g = 500 g | 200g x 5 = 1 000g | 500g – 300g = 200g | 1 000g : 5 = 200g |
c)
400 ml + 300 ml = 700 ml
800 ml : 4 = 200 ml
700 ml – 300 ml = 400 ml
200 ml x 4 = 800ml
800-x=200+100
800-x=300
x=800-300
x=500
800 - x = 200 + 100
800 -x = 300
x = 800 - 300
x = 500