Question

Hai số thập phân có tổng là 55,22. Nếu dời dấu phẩy của số bé sang trái một hàng ,rồi lấy hiệu giữa lớn và nó ta được 37,07.Hỏi

a,Tìm 2 số đó

b,Tổng hai số thập  phân là 15,83.Nếu dời dấu phẩy của số bé sang phải một hàng ,rồi trừ đi số lớn thì được 0,12.Tìm 2 số đó

 

Answer 1

 

Khi dời dấu phẩy của số bé sang trái một hàng tức là ta đã giảm số đó đi 10 lần. Nếu số bé mới phần thì số bé cần tìm 10 phần như thế. 

Ta có sơ đồ :

 Số lớn:                /-----/                                                         }

Số bé cần tìm:      /-----/-----/-----/-----/-----/-----/-----/-----/-----/-----/    } 55,22

Số bé mới:           /-----/                                                           }

Ta nhận thấy : 55,22 22 – 37,07 chính là 11 phần.

Số bé là : (55,22 – 37,07) : 11 x 10 = 16,5 

Số lớn là : 55,22 – 16,5 = 38,72. 

 Đáp số: Số lớn : 38,72. Số bé : 16,5 

Cho 1 đ-ú-n-g nha bạn

Answer 2

sao lại 1 mình phần a,còn phần b đâu vậy?

Answer 3

A +B =55,22 (A= 55,22-B)(1)

B × 0,1 +A= 37,07(2)

Thay 1 vao 2 ta co :

B×0,1+(55,22-B)=37,07

B×0,1+55,22+B=37,07

1,1×B=55,22-37,07

B=18,15÷1,1

B=16,5

A=55,22-16,5

A=38,72

Answer 4

ko aicho minh mot luot đúng à

Answer 5

sao lại 52,22 22 đề bài là 52,52 cơ mà

bạn nào thấy đúng cho mình nhé

Answer 6

đề bài là 55,22 cơ mà

mình nói đúng ko

Answer 7

đề bài là 55,52 cơ mà

có phải 55,22 22 đâu

Answer 8

bạn ơi ko có phần B hả

Answer 9

?????????....

.........????? x .Tìm x

Answer 10

sáo bạn kẻ bí mật lại coi số bé là 10 phần mà số lớn chỉ có 1 phần 

Answer 11

tại sao 55,22 - 37,07 lại chính là 11 phần 

?

Answer 12

kết quả đúng nhưng cách làm sai chắc1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 13

câu trả lời của kẻ bí mật mình thấy đúng nhưng chẳng hiểu sao cứ thấy hơi vô lí

Answer 14

A=38,72

B=16,5

Answer 15

cho 1 k nha ban

Answer 16

Tổng số bé cư và mới là: 55,22-37,07=18,15

Ta chia tổng 2 số bé thành 11 phần (số bé cũ là 10 phần, số bé mới là 1 phần)

Số bé cũ là: 18,15:(10+1)*10=16,5

Số lớn là: 55,22-16,5=38,72

                         Đ/S 16,5; 38,72

Answer 17

sao tổng mà lại là 55,22-37,07\??????????????????????????????????????

Answer 18

ko biet 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Answer 19

Khi dời dấu phẩy của số bé sang trái một hàng tức là ta đã giảm số đó đi 10 lần. Nếu số bé mới bằng 1 phần thì số bé cần tìm bằng 10 phần như thế. 

Ta nhận thấy : 55,22 – 37,07 chính là 11 phần.

Số bé là : (55,22 – 37,07) : 11 × 10 = 16,5 

Số lớn là : 55,22 – 16,5 = 38,72. 

Đáp số: Số lớn: 38,72. Số bé: 16,5.