Khi chuyển sang trái 1 hàng thì nhỏ hơn số ban đầu 10 lần hay A gấp 10 lân

Khi chuyển sang phải 1 hàng thì gấp số ban đầu 10 lần hay số B gấp 10 lần A.

 Vậy B gấp 100 lần C.

Tổng của A + B + C sẽ gấp C 111 lần.

Số C là: 222,999 : 111 = 2,009

Vậy số A là: 2,009.10 = 20,09

                 Đ/S : 20,09

ket ban voi mk nha

Ta thấy nếu duy chuyển đấu phẩy sang phải 1 số thì sẽ gấp 100 lần duy chuyển dấu phẩy sang trái 1 số nên số B gấp 100 lần số C. Nêm hiệu hai số sẽ gấp 99 lần số C.

Số C là: 198,792 : 99 = 2,008

Số A là: 2,008.10 = 20,08

Nếu chuyển dấu phẩy của số thập phân A sang bên trái một hàng ta được số B

=> A x 0,1 =  B
Chuyển dấu phấy của nó sang phải một hàng ta được số C

=> A x 10 = C
A + B + C = 221,778
A + A x 0,1 + A x 10 = 221,778
A x 11,1 = 221,778
A = 221,778 : 11,1 = 19,98

19,89 

hi bn

Giả sử số b có 1 phần 

khi đó số a có: 10 phần và số c có 100 phần 

Tổng số phần là: 1 + 10 + 100 = 111 ( phần ) 

Giá trị của 1 phần là: 917,75 : 111 = 8,26(801)

Số b là: 8,26(801) 

Số a là: 82,6(801)

Vì số A dịch dấu phẩy sang phải một hàng thì được số B nên số A gấp số B 10 lần, số B dịch dấu phẩy sang trái 1 hàng thì được số X nên số B gấp sỗ 10 lần => Số A là 100 phần, số B là 10 phần, số X là 1 phần.Vậy số A là: 222,999 : (100+10+1)x100=200,9

Đáp số: 200,9

nhớ k mình nha

19,89 CHÚC BẠN HỌC TỐT

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