cho 9 chu so tu nhien viet theo thu tu giam dan tu 9 den 1 nhu sau 9 8 7 6 5 4 3 2 1 co the dat duoc hay khong dau + hoac _ vao giua cac so do de duoc ket qua bang 16
cho 8 so 8 va cac dau. hay dat mot phep tinh co ket qua la 1000
1. Cho A = { 1; 2; 3; 4; 5; 6; 7; 8; 9 }. Hay viet tap hop A bang cach chi ra tinh chat dac trung bang 3 cach
2. Tim 3 so tu nhien lien tiep sao cho tong 3 so do la 36
3. Viet tap hop A cac so tu nhien co 3 chu so sao cho tong cac chu so cua moi so la 5
giup minh nhe minh se tickcho ^^ thank you very much !!!
1. tim ket qua cua phep nhan.
A = 33...3 * 99...9
--------- ----------
100so3 100so9
2.cho tap hop cac so tu nhien khong vuot qua 100 chia co 7 du 3
a, hay viet tap hop A = 2 cach
b, tinh tong cac phan tu cu A
c, tinh so chu so dung de viet cac tap hop A
3. nguoi ta danh so trang cua mot quyen sach = day so 1;2;3........quyen sach day 300 trang.hoi
a, tinh so chu so dung de danh so trang sach
b, chu so 659 thuoc trang nao va chu so may
bai 1;tinh gia tri bieu thuc 17a+15b+6a+8b voi a+b =100
bai 2;tich cua 2 so la 6210.neu giam 1 thua so di 7 don vi thi tich moi la 5265.tim cac thua so cua tich
bai 3;co 5 so tu nhien nao ma tich cua chung bang1001 va chu so tan cung la 6
bai 4;tinh;333...3.999...9 trong do co 50 chu so 3 va 50 chu so 9
1.so cac so nguyen x thoa man x2014=x2
2. so cac so co 3 chu so chia 7 du 3
3.dieu kien de /x+5/+/-3+y/> 0
4. cho 20 diem phan biet , trong do co a diem thang hang. Qua hai diem ta ve duoc 1 duong thang . Tim a biet ve duoc 170 duong thang
5. nguoi ta viet cac so tu nhien lien tiep bat dau tu 1 den 2014 lien nhau thanh 1 so tu nhien A . hoi so tu nhien A co bao nhieu chu so
6. cho tong s =2+5+8+11+14+...+3002 . hoi so hang thu 101 cua tong
neu co ba o vuong, o thu 1 co 3 so nhu sau: 2, -1, -3. O thu 2 co 3 so: 5, -4, 3, va o cuoi cung cung co 3 so: -5, 6, 9. Vay nguoi ta hoi lam the nao de cho tong cua ba hop duoc bang nhau, nhung cac ban chi duoc di chuyen mot so cua o nay qua o khac thoi nhe, nho day. Ban nao tra loi duoc cho mik ket ban nhe!
1.a Hay viet tap hop A cac so tu nhien ko vuot qua 10 bang 2 cach,bieu dien tren tia so cac phan tu cua tap hop A
b Xac dinh tap hop B cac diem bieu dien cac so tu nhien o ben phai diem 3 va ben trai diem 10 tren tia so.
2.a Dung 3 chu so 4,5,7 viet tat ca cac so tu nhien co 2 chu so moi moi chu so chi dc viet mot lan.
b Dung 3 chu so 6,3,0 viet tat ca cac so co 3 chu so , moi chu so chi duoc viet mot lan.
c Dung 4 chu so 1,5,4,8 lap duoc bao nhieu so tu nhien co 4 chu so khac nhau
6.a Tim 3 so tu nhien lien tiep co tong bang 48.
b Tim 4 so tu nhien chan lien tiep co tong bang 60
7.a Tim mot so tu nhien co chu so tan cung bang 2. Biet rang neu xoa chu so hang don vi cua no thi so moi giam di 1811 don vi
b Tim mot so tu nhien co 3 chu so biet rangneu viet them chu so 3 vao tan cung ben trai ta duoic so bang 26 lan so da cho
8.a Mot cuon sach co 147 trang duoc danh so tu 1. Hoi phai dung bao nhieu chu so da danh trong cuon sach.
b Nguoi ta dung 2016 chu so de danh so trang mot cuon sach hoi cuon sach do co bao nhieu trang
Chu so thu 1000 o trang nao va la chu so gi ?
HOI DAIIIIII NHUNG CAC BAN THONG MINH GIUP MINH NHA DAU DAU WA
CAC BAN HAY PHAN BIET RO CHU SO & SO GIUM MINH NHA
THANK YOU NHIEU
dat dau ngoac 1 cach thich hop nhat de tinh cac tong dai so sau :
a, 834 - 268 +2365 - 1834
b, 13 - 12 + 11 + 10 - 9 +8 -7 - 6 +5 - 4 +3 +2 - 1