2.(6) doi ra phan so bang bao nhieu
3.(1) doi ra phan so bang bao nhieu
3.(45) doi ra phan so bang bao nhieu
1.(5) doi ra phan so bang may
Qua diem O ve n duong thang phan biet [n lon hon hoac bang 2]
a. Co bao nhieu goc trong hinh ve ?
b.Co bao nhieu cap goc doi dinh nho hon goc bet trong cac goc tren?
biet on-so (inch) ky hieu "in" bang 2,54cm . hoi 1cm gan bang bao nhieu inh - so ( lam trong den so thap phan thu tu)
bai 1 : Hoc sinh khoi 6 co 195 nam va 117 nu tham gia lao dong. Thay phu trach muon chia thanh cac to sau cho so nam va nu moi to dieu bang nhau. Hoi co the chia nhieu nhat may to ? Moi to co bao nhieu nam va bao nhieu nu ?
bai 2 : Mot doi y te co 24 nguoi bac si va co 208 nguoi y ta. Co the chia doi y te thanh nhieu nhat bao nhieu to ? Moi to co may bac si va may y ta ?
bai 3 : Co Lan phu trach doi can chia so trai cay trong do 80 qua cam, 36 qua quyt va 104 qua nam vao cac dia banh keo trung thu sao cho so qua mi loai trong cac dia la bang nhau. Hoi co the chia thanh nhieu nhat bao nhieu dia ? khi do moi dia co bao nhieu trai cay moi loai ?
bai 4 : Binh muon cat mot tam bia hinh chu nhat co kich thuoc bang 112 cm va 140 cm. Binh muon cat thanh cac manh nho hinh vuong bang nhau sao cho tam bia duoc cat het khong con manh nao. Tinh do dai canh hinh vuong co so do la so do tu nhien ( don vi do la cm nho hon 20 cm va lon hon 10 cm )
Giai giup minh zoi
cau 1 ,cho m,n thuoc n va p la so nguyen to thoa man p/m-1=m+n/p
CMRp^2=n+2
cau 2,cho a,b,c thoa man a+b+c=0 CMRab+bc+ca be hon hoac bang 0
cau 3,bay gio la 4 gio 10 phut hoi sau it nhat bao lau thi hai kim dong ho nam doi dien nhau tren mot duong thang
cau 4,so 2^100 viet trong he thap phan tao thanh 1 so hoi so do co bao nhieu chu so
cau 5,cho a,b,c la so do 3 canh cua mot tam giac vuong voi c la so do canh huyen CMRa^2n+b^2n be hon hoac bang c^2n (n la so tu nhien lon hon 0 )
Tong cua phan so toi gian la 1 so nguyen.Chung to mau cua hai phan so do bang nhau hoac doi nhau.
