tim so co hai chu so AB biet 1ab =36 = ab1
co hai chu so ab, biet rang 1ab+36=ab1 so can tim la
Ta có: 1ab + 36 = ab1
=> 100 + 10a + b + 36 = 100a + 10b + 1
=> 136 + 10a + b = 100a + 10b + 1
=> 135 = 90a + 9b
=> 135 = 9 ( 10a + b )
=> 135 : 9 = ab
=> ab = 15
Vậy số cần tìm là 15
tim so co 2 chu so dang ab biet rang 1ab + 36 =ab1.So can tim la
6. tim a,b,c thoa man
a, 481abc=1481.abc
b, 1ab+36=ab1
7. tim so co 2 chu so , biet rang neu viet chu so 0 xen giua hai chu so do thi duopc so co 3 chu so gap 9 lan so co 2 chu so ban dau??
Bai 1 :
a) Tim abcd biet : a x bcd = 1001 b) Tim ab ; biet ab x aba = abab
Bai 2 Tim so co hai chu so, biet rang neu viet them chu so 6 vao ben trai so da cho thi duoc so moi gap 7 lan so cu.
Bai 3: Tim so co ba chu so, biet rang neu viet them chu so 3 vao ben trai so da cho thi duoc so moi gap 7 lan so do
Bai 4 :
a) Tim cac so a7b cung chia het cho 5 va 9 b) Tim cac aso 1ab cung chia het cho 5 va 3
Bai 5 : Tim so co hai chu so, biet rang so do chia cho hang don vi cua no thi duoc thuong la 6, du 5.
Bai 6: Cho so co hai chu so trong do chu so hang don vi la 7. Tim so da cho, biet rang neu chia so do cho tong cac chu so cua no thi duoc thuong la 5 va du 12.
tim cac chu so a,b biet so tu nhien ab*a=1ab (ab la so tu nhien)
ab*a=1ab
==>a^2 * b =a*b
==>a^2=a*b
==> a=b
vậy a=b \(\forall\)x\(\in\)N
1ab+36=ab1 tim ab
1ab + 36 = ab1
100 + ab + 36 = ab x 10 + 1
136 + ab = ab x 10 + 1
=> 136 - 1 = ab x (10 - 1)
=> 135 = ab x 9
=> ab = 135 : 9
=> ab = 15
Vậy ab = 15
Ủng hộ mk nha !!! ^_^
1ab + 36 = ab1
100 + ab + 36 = ab x 10 + 1
136 + ab = ab x 10 + 1
=> 136 - 1 = ab x (10 - 1)
=> 135 = ab x 9
=> ab = 135 : 9
=> ab = 15
Vậy ab = 15
a. ab1 - 1ab = 36
b. a0b = 7ab
tim cac chu so a va b
Tìm so co hai chu so biet rang neu ta viet them chu so 2 vao ben trai va ben phai so do ta duoc so moi gap 36 lan so phai tim.
dien so thich hop vao cac chu de duoc phep tinh dung
a, 1ab+36=ab1
b, abc+acc+dbc=bcc
khi ko mún tích thì tích 1 tích
khi mún tích thì tích 50 tích