cau 7 chung minh phai Quan tam den me

cau 8 nhan vat be bong ,yeu ot co nhan dao duc rat tot

cau 9 la lanh ngach

Bai giai

co hang xep duoc so thung banh nhu vay la

48 /8=6 [thung banh]

dap so ; 6 thung banh

[a]100

[b]273

[c]27

[d]223

[a ] aed edg egc ecb edgc [b] aecgd aegd ebcg aebcgd

[a ] aed edg egc ecb edgc [b] aecgd aegd ebcg aebcgd

cau a) D

cau b)S

cau c)S

cau d)S