x + 200 = 500 - 80
x + 200 = 420
x = 420 - 200
x = 220
ai k mik mik k lại
x+200=500-80
x+200=420
x=420-200
x=220
x +200=500-80
x+200=420
x=420-200
x=220
x+200=500-80
x+200=420
x =420-200
x =220
x+200=500-80
x+200=420
x=420-200
x=220
x + 200 = 500 - 80
x + 200 = 420
x = 420 - 200
x = 220
ai k mik mik k lại
x+200=500-80
x+200=420
x=420-200
x=220
x +200=500-80
x+200=420
x=420-200
x=220
x+200=500-80
x+200=420
x =420-200
x =220
x+200=500-80
x+200=420
x=420-200
x=220
500 + x = 100 + 500
300 - x = 300 + 200
400 - x = 200 + 400
x + 200 = 500 + 500
x + 500 = 500 + 200
tính nhanh :
100 x 200 + 200 x 500 + 200 x 400
x + 200 = 500 + 200
Tính nhẩm:
Cách làm: 200 x 3 = ?
Nhẩm: 2 trăm x 3 = 6 trăm
Vậy: 200 x 3 = 600
200 x 2 = 300 x 2 =
200 x 4 = 400 x 2 =
100 x 5 = 500 x 1 =
x + 200 = 500 + 200
tick mik mik tick lai
b) 200 x 4 = ...... 300 x 2 = ......
200 x 2 = ...... 300 x 3 = ......
400 x 2 = ...... 500 x 1 = ......
100 x 4 = ...... 100 x 3 = ......
x + 200 = 500