Question

[Kl12345667]

Điền vào phép tính :  xy,mn = 19,94 + 0,xy

Answer 1

[T.Anh 2K7(siêu quậy)(тoáɴ๖ۣۜнọc)]

Dế thấy \(0,\overline{xy}< 1\Rightarrow19.94+0,\overline{xy}< 20,94\)

\(\Rightarrow\overline{xy},\overline{mn}< 20,94\Rightarrow\overline{xy}\le20\)

Mà\(19,94< \overline{xy},\overline{mn}\Rightarrow\overline{xy}\ge19\)

\(\Rightarrow\overline{xy}=19;\overline{xy}=20\)

Nếu \(\overline{xy}=19\Rightarrow19,\overline{mn}=19,94+0,19=20,13\left(L\right)\)

Nếu \(\overline{xy}=20\Rightarrow20,\overline{mn}=19,94+0,20=20,14\Rightarrow\overline{mn}=14\)

Vậy ta có phép tính sau: 20,14=19,94+0,20