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!

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

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

thanks very much

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có cần thiết vậy ko bạn

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0

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

Số trừ là:4,46

Số bị trừ là:75,24

kết quả ;số trừ :4,46

              số bị trừ :75,24

mình bài này cô mình dạy mình r

dddddddddddđ