Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số A sang trái một hàng ta được số B và sang phải một hàng ta được số C và A+B+C= 259.74
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Tìm số thập phân A , biết nếu chuyển dấu phẩy của số A sang trái 1 hàng ta được số B và sang bên phải 1 hàng ta được số C và A+B+C=259.74
Nếu chuyển dấu phẩy của A sang trái 1 hàng được B.Vậy B=Ax0,1
Nếu chuyển dấu phẩy của A sang phải 1 hàng được C.Vậy C=Ax10
Ta có:A+B+C=259,74
A+Ax0,1+Ax10=259,74
Ax(1+0,1+10)=259,74
Ax11,1 =259,74
A =259,74/11,1
A =23,4
Vậy số thập phân A là:23,4
chúc bạn may mắn@@@
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Tìm một số thập phân A, biết nếu dịch chuyển dấu phẩy của số A sang bên trái một hàng ta được số B và sang bên phải một hàng ta được số C và A + B + C =259,74
số B là 259,74 / (100+10+1) =2,34
số A là chuyển dấu phẩy sang phải 1 hàng là 23,4
số C là chuyển dấu phẩy sang phải 2 hàng là 234
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Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số A sang bên trái một hàng ta được số B và sang bên phải một hàng ta được số C và A + B + C = 259,74.
tìm số thập phân a biết nếu dịch chuyển dấu phẩy của số a sang bên trái một hàng ta được số b và sang bên phải một hàng ta được số c và a+b+c=259,74
Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số đó A sang bên trái một hàng ta được số B và sang bên phải một hàng ta được số C và A + B + C = 160,281
CÁC BẠN GIÚP MK VỚI
Đáp án: 30,0230,02
Lời giải chi tiết:
-Nếu chuyển dấu phẩy của số A sang bên trái một hàng được số B thì số B là 11 phần, số A là 1010 phần.
-Nếu chuyến dấu phẩy của số A sang bên phải một hàng được số C thì số C là 100100 phần.
-Hiệu số phần bằng nhau là:
100−1=99100−1=99 (phần)
-Số thập phân A là:
297,198:99×10=30,02297,198:99×10=30,02
Đáp số: 30,02
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Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số đó A sang bên trái một hàng ta được số B và sang bên phải một hàng ta được số C và A + B + C = 259,74.
Khi dịch chuyển dấu phẩy của A sang bên trái/phải 1 hàng thì A giảm đi/tăng lên 10 lần và được số B/C nên B = A/10 ; C = 10A . Ta có : A + B+ C = A + A/10 + 10A = 11,1A = 259,74 => A = 259,74 : 11,1 = 23,4.
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Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số A sang bên trái một hàng ta được số B và sang bên phải một hàng ta được số C và A + B + C = 259,74.
Trả lời:
Số thập phân A là: .............
Tìm số thập phân A, biết rằng nếu chuyển dấu phẩy của nó sang bên trái một hàng ta được số B, chuyển dấu phẩy sang phải một hàng ta được số C. Tổng của A,B và C là 221,778
19,89 CHÚC BẠN HỌC TỐT
19,98 100%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số đó A sang bên trái một hàng ta được số B và sang bên phải một hàng ta được số C và A + B + C = 259,74.
Doi dau phay cua so A sang ben trai mot hang thi duoc so B, nhu vay so A gap 10 lan so B. Doi dau phay cua A sang ben phai mot hang thi duoc so C, vay thi C gap A 100 lan. C se gap B so lan la: 10*10= 100 [lan] So B la: 259,74:[ 1 + 10 +100 ] =2,34 Vay so A= 2,34*10=23,4 DS:23,4
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