Question

Hiệu của hai số thập phân là 70,78. nếu dịch dấu phẩy cả số trừ sang phải một hàng thì hiệu mới là 30,64. tìm hai số thập phân đó

Answer 1

Khi dịch chuyển dấu phẩy của số trừ sang phải một hàng thì ta được số trừ mới gấp 10 lần số trừ cũ.
Vẽ sơ đồ: Số trừ cũ: |------|
               Số trừ mới: |------|------|------|------|------|------|------|------|------|------|
Hiệu giữa số trừ mới và số trừ cũ là:
70,78 - 30,64 = 40,14
Số trừ cũ là:
40,14 : (10 - 1) x 1 = 4,46
Số bị trừ là:
70,78 + 4,46 = 75,24
Đáp số: Số trừ: 4,46
            Số bị trừ: 75,24
LIKE nha!

Answer 2

Khi dịch dấu phẩy  của số trừ sang phải 1 hàng thì số đó gấp lên 10 lần số cũ

Coi số cũ là 1 phần thì số mới là 10 phần như thế

Hiệu số  phần bằng nhau là:

10 - 1 = 9 (phần)

Hiệu số cũ và số mới là

70,78 - 30,64 = 40,14

Số trừ cũ

40,14 ;  9 = 4,46

Số bị trừ

70,78 = 4,46 = 75,24

Đ/S: số trừ ; 75,24

         số bị trừ : 4,46

line mình nhé

Answer 3

Hiệu  số trừ mới và số trừ cũ là:

70,78 - 30,64 = 40,14

Số trừ là:

40,14 : ( 10 -1 ) x 1 = 4,46

Số bị trừ là:

70,78 + 4,46 = 75,2

Đáp số: 4,46

            75,2

Answer 4

thanks very much

Answer 5

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Answer 6

trương thị van anh

Answer 7

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Answer 8

có cần thiết vậy ko bạn

Answer 9

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Answer 10

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Answer 11

mình cũng đang cần bài giải này !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 12

Số trừ là:4,46

Số bị trừ là:75,24

Answer 13

kết quả ;số trừ :4,46

              số bị trừ :75,24

Answer 14

mình bài này cô mình dạy mình r

Answer 15

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