bai gai

chieu cao hinh binh hanh la

189:7=27(M)

dien tich hinh binh hanh la

47.27=1269( met vuong)

bon canh bang nhau

EF=FG=GH=HE

hai cap doi EFvaGH,GFvaEH song song voi nhau

bon dinh E,F,G,H

hai duong cheo EG,HF vuong goc voi nhau

hinh vuong co bon canh bang nhau

AB=BC=CD=DA=4CM

va bon goc dinh A,B,C,D bang nhau va cac goc vuong (goc 90do)

bai giai

so tien me LAN da mua la

24500.2+21000.5=154000 (dong)

so tien con lai cua me LAN sau khi mua la

160000-154000=6000(dong)

dap so:6000dong

a) 67.36+67.65-67

=67.(36+65-1)

=67.100

=6700

a) VI;24=XXIV;39=XXX

cac uoc lon hon 6 cua so 36 la 9;12;18;36