tim mot so co ba chu so nho hon 115 co hieu giua chu so hang don vi va chu so hang tram la 7 .
Tim mot so co ba chu so biet hieu giua chu so hang
tram va chu so hang don vi la so lon nhat co ba chu so,
chu so hang chuc kem chu so hang tram la 4.
so do la 950
em hay tim so co ba chu so ma hieu cua chu so hang tram va chu so hang chuc la 0 con hieu cua chu so hang chuc va chu so hang don vi bang 9
nhiều lắm. vd: 118,227,336,445,545,663,636,..........
tong cac chu so cua 1 so co 3 chu so la 21 chu so hang don vi lon hon chu so hang chuc .neu ta doi vi tri chu so hang don vi va chu so hang tram thi duoc mot so moi co gia tri lon hon so cu la 198. tim so cu .
giup mk nhe
Tim so co 3 chu so co tong cac chu so la 20 va ti so giua chu so hang tram voi chu so hang don vi la 2 , con chu so hang chuc bang chu so hang tram
Gọi số đó là abc (a>0;a,b,c<10)
Ta có:
a=2c và a=b \(\Rightarrow\)b=2c
a+b+c=20
2c+2c+c=20
5c=20
c=4
=>a=8
Vậy abc=884
Ta co so do :
chu so hang tram [---------]-----------]
chu so hang chuc [----------]-----------] [ 20 ]
chu so hang don vi [----------]
chu so hang don vi la
20 : [2 + 2 +1 ]= 4
chu so hang tram va chuc la
4 x 2 = 8
so phai tim 884
tim so co 3 chu so biet chu so hang tram nho hon chu so hang chuc,chu so hang chuc nho hon chu so hang don vi va tong cac chu so do bang 6
123, 321,213,231,312,132
Tất cả đó Bạn
tim tat cac so tu nhien co ba chu so thoan man cac tinh chat sau : co tong cac chu so bang 9 chu so hang chuc lom hon chu so hang don vi la 2 don vi va neu ta doi chu so hang tram cho hang don vi thi duoc so moi lon hon so ban dau la 198 don vi
tim so co 3 chu so co tong cac chu so la 20 va ti so giua chu so hang tram voi chu so hang don vi la 2, con chu so hang chuc bang voi chu so hang tram.
giai ro rang nhe
chu so hang tram gap 2 lan so voi chu so hang don vi ma chu so hang chuc lai bang hang tram nen chu so hang chuc cung chiem hai phan. Vi vay se co tong so phan la : 2+2+1=5
Cu giai nhu tong ti va so can tim la : 884
so do la 884. Ban cu lam theo cach tong ti
Ban cu lam theo cach tong ti va dap an cua to la: 884
tim so co 3 chu so biet chu so hang tram nho hon chu so hang chuc neu doi 2 chu so nay cho nhau ta duoc so moi hon so cu 720don vi biet tong cua chu so hang don vi la 7
Tim so co 3 chu so biet chu so hang tram bang hieu giua chu so hang chuc voi chu so hang don vi . ta duoc thuong la 2 va du 2
giup minh voi minh sap di hoc roi
s lại đc thương là 2 dư 2 bn, chia cho bn vậy
dung do sao lai thuong 2 dư 2 ! chứng tỏ đề bài sai
[ thường luôn luôn lớn hơn dư 1 đơn vị ]
Như vậy là đề bài sai
ai thấy đúng hay tk mk ^_^