Ki-lô-mét vuông

Giáo viên thực hiện: Vũ Văn Diện   Toán: Toán: Ki – lô –mét vuông Ki – lô –mét vuông   x   2 Đc Đc Vit Vit  !"##$  !"##$ %##$ %##$ &' &' ( ( Bi1 ( 100))*+",-./0," ' '       1##$ 1##$ 2 ! 2 ! ##$ ##$       Bi 2( 100):)*+"/0,34 555555555555555555555555      5555555555555    &5555555555 5555555556     (7'65555555556 555555555     Bi 3 (100): 89:.;<=6(= 95%>6?:@<ABA,C ##$5 Bi giải : ( x  = DEF 2 G0+"D 2 Bi 4 ( 100 ):,+"6 H@IJK+"@, /0L F0MKNO'6O AF H)1&O(76O  (('' 7       ((''  7  Xin cảm ơn các thầy cô giáo v các em hc sinh .   Toán: Toán: Ki – lô –mét vuông Ki – lô –mét vuông   x   2 Đc Đc Vit Vit 