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$\text{2,4x0,25+5,6:4+2x$\frac{1}{4}$}$

$\text{=2,4 x $\frac{1}{4}$ + 5,6 x $\frac{1}{4}$ 2 x $\frac{1}{4}$ }$

$\text{= $\frac{1}{4}$ x ( 2,4 + 5,6 + 2)}$

$\text{= $\frac{1}{4}$ x 10}$

$\text{= $\frac{10}{4}$}$

$\text{=$\frac{5}{2}$}$

***

$\text{3,47x$\frac{1}{2}$ -2,47:2+0,5}$

$\text{3,47x$\frac{1}{2}$ -2,47x$\frac{1}{2}$+$\frac{1}{2}$}$

$\text{=$\frac{1}{2}$ x ( 3,47 - 2,47 + 1}$

$\text{=$\frac{1}{2}$x2}$

$\text{=$\frac{2}{2}$}$

$\text{= 1}$

***

$\text{3,67x0,125+4,66x1/16+0,25}$

$\text{=3,67 x $\frac{1}{8}$ + 4,66 x $\frac{1}{16}$+$\frac{1}{4}$}$

$\text{=$\frac{3,67}{8}$ + $\frac{4,66}{16}$+$\frac{1}{4}$ }$

$\text{=$\frac{7,34}{16}$ + $\frac{4,66}{16}$+$\frac{4}{16}$}$

$\text{=$\frac{7,34+4,66+4}{16}$}$

$\text{=$\frac{16}{16}$}$

$\text{=1}$

$\text{#bich2k9}$^^

Đáp án:

Bạn tham khảo nhé.

Giải thích các bước giải:

$2,4\times0,25+5,6:4+2\times\dfrac14\\=2,4\times\dfrac14+5,6\times\dfrac14+2\times\dfrac14\\=\dfrac14\times\left(2,4+5,6+2\right)\\=\dfrac14\times(8+2)\\=\dfrac14\times10\\=\dfrac52\\3,47\times\dfrac12-2,47:2+0,5\\=3,47\times\dfrac12-2,47\times\dfrac12+\dfrac12\\=\dfrac12\times(3,47-2,47+1)\\=\dfrac12\times(1+1)\\=\dfrac12\times2\\=1\\3,67\times0,125+4,66\times\dfrac1{16}+0,25\\=3,67\times\dfrac18+2,33\times2\times\dfrac1{16}+\dfrac14\\=3,67\times\dfrac18+2,33\times\dfrac18+\dfrac18\times2\\=\dfrac18\times(3,67+2,33+2)\\=\dfrac18\times8\\=1$