Question

[Nguyễn Nhật Hạ]

$12,56:0,2+12,56:0,25+12,56$

$=12,56\times 5+12,56\times 4+12,56\times 1$

$=12,56\times (5+4+1)$

$=12,56\times (9+1)$

$=12,56\times 10=125,6$

$sao\; lại\; ra\; như\; vậy\; ạ.Giải\; thích\; giúp\; iem.LƯU\; Ý:TÍNH\; NHANH$

Answer 1

[Akai Haruma]

$12,56:0,2+12,56:0,25+12,56$

$=12,56:\frac{2}{10}+12,56:\frac{25}{100}+12,56\times 1$

$=12,56\times \frac{10}{2}+12,56\times \frac{100}{25}+12,56\times 1$

$=12,56\times 5+12,56\times 4+12,56\times 1$

$=12,56\times (5+4+1)$

$=12,56\times 10=125,6$