Ta có: Từ 2*2 đến 2*100 là:100:2-1=49 số.Vấy só mủ thứ 100 là:2*204
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cho day so theo quy luat 2mu2 mu thu 100 la
Cau 1: viet 1000 so tu nhien dau tien , hoi chu so 3 co mat bao nhieu lan.Cau 2:de danh so trang 1 quyen sach nguoi ta dung 1995 chu so.hoi cuon sach day bao nhieu trang.Cau 3:Giai thich tai sao :a/so co 4 chu so xyxy khi chia cho so 2 chu so xy lai co thuong la 101.b/so co 6 chu so xyvxyv khi chia so co 3 chu so xyv lai co thuong la 1001Cau 4: Cho day so 4,7,10,13,16,.....a/tim so thu 100 cua day,so thu n cua day .b/So 45+23 co mat trong day do koCau 5:tim so tu nhien co 5 chu so,biet rang ne...
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Cau 1: viet 1000 so tu nhien dau tien , hoi chu so 3 co mat bao nhieu lan.
Cau 2:de danh so trang 1 quyen sach nguoi ta dung 1995 chu so.hoi cuon sach day bao nhieu trang.
Cau 3:Giai thich tai sao :
a/so co 4 chu so xyxy khi chia cho so 2 chu so xy lai co thuong la 101.
b/so co 6 chu so xyvxyv khi chia so co 3 chu so xyv lai co thuong la 1001
Cau 4: Cho day so 4,7,10,13,16,.....
a/tim so thu 100 cua day,so thu n cua day .
b/So 45+23 co mat trong day do ko
Cau 5:tim so tu nhien co 5 chu so,biet rang neu them 2 chu chu so vo dang su so do thi duoc so lon gap 3 lan so do co duoc bang cach viet them chu so 2 vao da truoc so do
bai 1 : ban nam danh so sach trong 1 cuon sach day 284 trang = cac so chan 2 , 4 , 6 , 8 ,..........
a, biet moi chu so viet het 1 giay . hoi ban nam can bao nhieu thoi gian de danh so trang trong cuon sach ?
b , chu so thu 300 cua day la chu so nao ?
1, viet them 3 so vao day so sau
1,8,27,64.............
1,5,10,17,26...................
bai nay la cua em hang xom ma bay gio len hoi nen hoi cho lun
2,co bao nhieu so chan co 2 chu so ? tinh tong cac so chan co 2 chu so
bai 1 lop 6 ,bai 2 lop 4
mn giup minh voi
cho day so 3,8,13,18,......
a, neu quy luat cua day so tren
b, viet tap hop a gom 5 so hang lien tiep cua day so tren
c, tinh tong 100 so hang dau tien cua day
d, so 158 la so hang thu bao nhieu cua day
cam mn nhieu love you
ban lam danh so trang sach cua mot cuon sach day 284 trang bang day so chan 2 ,4,6,8 vv.biet moi chu so viet mat mot giay hoi ban lam can bao nhieu phut de danh trang sach b/ chu so thu 300 ma ban lam viet la chu so nao
Nguoi ta viet cac so chan thanh 1 day 2468...Hoi chu so thu 2000 la bao nhieu
nguoi ta viet cac so tu nhien thanh day 123...2016.hoi chu so thu 1010 la chu so nao?day tren gom bao nhieu chu so
4,cho dy so
1,3,5,7,9.......,79
a,day tren co bao nhieu so hang
b,day tren co bao nhieu so co 2 chu so
c,de viet day tren can viet may chu so
d,so thuu 25 cua day la so nao