Violympic toán 6
Các câu hỏi tương tự
tinh nhanh : 33...3 . 66..6(moi so co 50 chu so)
Co bao nhieu so la ;
a) Cac so chan co hai chu so.
b) Cac so le co hai chu so.
O hai cau hoi tren can phai ghi phep tinh ra tren tung cau hoi
mot lop hoc co so hoc sinh nu chiem 45/100 so hoc sinh nam cua lop la 33 Tinh so hoc sinh lop do
bai 1. 11/3.40/13+37/5:7/33-(11/13.1/3+33/7:5/2)
bai 2.tim x
a,3.(x-1)-5.(-7)(-2)^3-2x
b,2./(1-x)^2+1/-2^2.38
bai 3,cho bieu thuc
Mn+1/n+1 - 3-8n/n+1 + 8/n+1
tim cac gia tri cua n de bieu thuc M co gia tri la so nguyen
bai 4,So hoc sinh cua 1 truong ko qua 1000 em,neuxeptoan bo so hoc sinh cua truong do thanh cac hang,moi hang 20 nguoi thi con thieu 5 nguoi,neu xep moi hang 25 nguoi hoac 30 nguoi thi deu thua 15 nguoi , neu xep 42 hang thi vua du . hoi truong do co bao nhieu hoc sinh...
Đọc tiếp
bai 1. 11/3.40/13+37/5:7/33-(11/13.1/3+33/7:5/2)
bai 2.tim x
a,3.(x-1)-5.(-7)=(-2)^3-2x
b,2./(1-x)^2+1/-2^2.3=8
bai 3,cho bieu thuc
M=n+1/n+1 - 3-8n/n+1 + 8/n+1
tim cac gia tri cua n de bieu thuc M co gia tri la so nguyen
bai 4,So hoc sinh cua 1 truong ko qua 1000 em,neuxeptoan bo so hoc sinh cua truong do thanh cac hang,moi hang 20 nguoi thi con thieu 5 nguoi,neu xep moi hang 25 nguoi hoac 30 nguoi thi deu thua 15 nguoi , neu xep 42 hang thi vua du . hoi truong do co bao nhieu hoc sinh
bai 5,cho bieu thuc
A=2+2^2+...+2^200
c/m rang
a, A+2 la 1 luy thua cua 2
b, Achia het cho 30
c,A co phai la so chinh phuong ko ? vi sao ?
bai 6,cho 2 bieu thuc
A=1/1+2 + 1/1+2+3 + ...1/1+2+3+...+99
B=1 + 1/2^2+1/3^2 + ...+1/49^2
c/m rang A<B
co bao nhieu so le co 3 chu so chia 9 du 7
Trong 1 lop 60% so hs gioi la 9 em
a)tinh so hs gioi cua lop
b)2/3 hs kha = 80% HSgioi. tim so hs kha cua lop
C)biet lop chi co gioi va kha. tim tong so hs cua lop
ai nhanh mk tick cho
cho a la so lon nhat co n chu so b la so nho nhat co n+1 chu so thi
Tim so co 3 chu so abc biet 1abc chia cho abc du 3
tong cac so tu nhien co 3 chu so khac nhau duoc lap tu 1;2;3;4;5