tich cua cac so le lon hon 3000 va nho hon 56789 co tan cung la chu so nao?
So chan la so tu nhien co chu so tan cung la 0;2;4;6;8 ; so le la so tu nhien co chu so tan cung la 1;3;5;7;9;.Hai so chan ( hoac so le ) thi
hon kem nhau 2 don vi a)viet tap C cac chang nho hon 10.b) viet tap hop L cac so le lon hon 10 nhung nho hon 20.c)viet tap hop A ba chu so chan lien tiep trong do so nho nhat la 18.d)viet tap hop B bon so le lien tiep, trong do so lon nhat la 31
a) C = { 0 ; 2 ; 4 ; 6 ; 8 }
b) L = { 11 ; 13 ; 15 ; 17 ; 19 }
c) A = { 18 ; 20 ; 22 }
d) B = { 25 ; 27 ; 29 ; 31 }
so phan tu cua tap hop cac so tu nhien chan lon hon 13 va nho hon 3000 la;
so phan tu cua tap hop cac so tu nhien chan lon hon 13 va nho hon 3000 la
tim tat ca cac so tu nhien có 2 chu so biet rang chu so hang don vi nho hon chu so hang chuc la 2 va tich cua chu so do cua no luon lon hon tong cua hai chu so cua nó la 34 don vi
cho B la tap hop cac so tu nhien chan khong nho hon 13 va khong lon hon 3000. B co so phan tu la......
mot so co hai chu so biet tong cac chu so cua no la 8 hieu cac chu so cua cua no la 4 va chu so hang chuc lon hon hang don vi so do la so nao
tich cua cac chu so le tu 1 den 21 co tan cung la cvhu so nao
tận cùng sẽ là số 0
vì :
số nào nhân vs 10 thì sẽ thêm 0
VD: A x 10 = A0
vậy số cuối cùng sẽ là 0
So cac so thap phan co 3 chu so phan thap phan ma cac so do lon hon 10 va nho hon 11 la
Từ 10,001 ;10,002;........10,999
[10,999-10,001]:0,001 +1 =999 [số]
k mk nha bạn
999 dung 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
Tim so tu nhien co 2 chu so biet rang chu so hang chuc lon hon chu so hang don vi la 2 va so do lon hon tong cac binh phuong cac chu so cua no la 1.