Tìm số có 3 chữ số, biết khi viết thêm chữ số 8 vào bên phải số đó thì đúng bằng số đó thì đúng bằng số đó có được khi viết thêm chữ số 2 vào bên trái số cần tìm
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tìm số có 3 chữ số biết khi viết thêm chữ số 8 vào bên phải số đó thì đúng bằng số có được khi viết thêm chữ số 2 vào bên trái số cần tìm và gấp lên 3 lần
Tìm một số có ba chữ số biết rằng khi viết thêm chữ số 1 vào bên phải số đó thì được số gấp 3 lần số có được bằng cách viết thêm chữ số 2 vào bên trái số đó.
abc1 = 2abc x 3
abc x10 +1 = (2000 + abc)x3
abc x10 + 1 = 6000 + abc x 3
abc x 7 = 5999
abc = 857
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Tìm 1 số có 3 chữ số,biết rằng khi viết thêm chữ số 1 vào bên phải số đó thì ta được 1 số gấp 3 lần số có được bằng cách viết thêm chữ số 2 vào bên trái số đó
Gọi 3 số là abc
theo đb ta có
abc1=3 x 2abc
abc x 10 +1 =3x 2000+3abc
7 abc= 5999
abc=857
vậy số đó là 857
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857 dung 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Tìm một số có ba chữ số biết rằng khi viết thêm chữ số 1 vào bên phải số đó thì được số gấp 3 lần số có được bằng cách viết thêm chữ số 2 vào bên trái số đó. Tìm 2 số biết tích và thương của chúng đều bằng 5.
abc1 = 2abc x 3 abc x10 +1 = (2000 + abc)x3 abc x10 + 1 = 6000 + abc x 3 abc x 7 = 5999 abc = 857 axb=5.(0<a,b<=5) a=5xb. Nen b = 1( vi a <hoac = 5) vay a=5
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tìm số có 3 chữ số biết rằng khi viết thêm chữ số 1 vào bên phải số đó thì ta được số mới gấp 3 lần số có được bằng cách viết thêm chữ số 2 vào bên trái số đó?
giải bằng cấu tạo số
Bài 1: Khi viết thêm số 65 vào bên phải 1 số tự nhiên có 3 chữ số. Thì số đó tăng thêm 977798 đơn vị. Tìm số đó.
Bài 2; Tìm 1 số tự nhiên có 2 chữ số, biết rằng khi viết chữ số 5 bào bên phải số đó thì số đó tăng thêm 230 đơn vị.
Bài 3: Tìm 1 số tự nhiên có 3 chữ số, biết rằng khi viết thêm chữ số 9 vào bên trái số đó ta được 1 số gấp 26 lần số cần tìm.
Tìm một số có ba chữ số biết rằng khi viết thêm chữ số 1 vào bên phải số đó thì ta được một số gấp ba lần số có được bằng cách viết thêm chữ số hai vào bên trái số đó
ko muốn động não em tự nghĩ nhé
tìm số tự nhiên có 5 chữ số biết khi viết thêm chữ số 2 vào bên phải số đó thì được số lớn gấp 3 lấn số có được do viết thêm chữ số 2 vào bên trái số đó
Tìm số có 5 chữ số biết rằng nếu viết thêm chữ số 2 vào bên phải số đó thì được số gấp 3 lần số có được bằng cách viết thêm chữ số 2 vào bên trái số đó