1 tinh gia tri bieu thuc
a.15.311+4.278:97
b,5.213.411-169:(3.217)2
2 so sánh
1512và 813.1255
50717và 719
520 và 221
bai 1: Thuc hien phep tinh
a) 75/100 + 18/21 + 19/32 + 1/4 + 3/21 + 13/32
b) 22/5 + 51/9 + 11/4 + 3/5 + 1/3 + 1/4
bai 1
cho bieu thuc A = 5/n+1 voi N THUOC Z
a, de A la phan so thi n co dieu kien gi ?
b , tim tat ca cac gia tri nguyen cua n de gia tri A la 1 so nguyen ?
bai 2
cho bieu thuc M = 6/n-3 voi n thuoc Z .Co bao nhieu gia tri cua n de :
a, M ko phai la phan so
b , M la phan so va cp gia tri nguyen ?
bai 3 viet tap hop cacs so nguyen sao cho :
-12/4 < x <6/3
khong thuc hien phep nhan hay nhan xet xem moi tich sau tan cung boi chu so nao ?
a, 1 2 3 4 5 6 7 8 9
b, 1 3 5 7 9 11
viet ket qua duoi dang luy thua 4^20 * 8^10
Mot thua ruong hinh thang co dien tich la 576m vuong,trung bing cong hai day la 36m.
a/Tinh chieu cao thua ruong do.
b/Biet hieu hai day la 10m,tinh do dai moi canh day cua thua ruong hinh thang.
Nam hoc 2012-2013 ca nuoc ta co 15407 truong Tieu hoc, 10837 truong THCS va 2714 truong THPT. Em hay dung bieu do hinh cot bieu dien ti so phan tram cua cac loaij truong noi tren trong he thong Giao duc pho thong Viet Nam
Ai biet thi giup minh voi nha
Cau hoi la :tim so tu nhien co 5 chu so biet rang neu viet them chu so 2 vao dang sau so do thi duoc so lon gap 3 lan so co duoc bang cach viet them chu so 2 vao dang truoc so do
[ ai lam dung minh se tich cho]
Mot don vi bo doi khi xep hang moi hang co 20 nguoi hoac 25 nguoi , hoac 30 nguoi deu thua 15 nguoi . Neu xep moi hang 41 nguoi thi vua dua.Hoi don vi co bao nhieu nguoi biet rang cua don vi chua den 1000 nguoi .