Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: Tính bằng cách thuận tiện 2,4×0,25+5,6:4+2×1/4 3,47×1/2-2,47:2+0,5 3,67×0,125+4,66×1/16+0,25

Toán Lớp 5: Tính bằng cách thuận tiện
2,4×0,25+5,6:4+2×1/4
3,47×1/2-2,47:2+0,5
3,67×0,125+4,66×1/16+0,25

Comments ( 2 )

  1. Giải đáp:
    Bạn tham khảo nhé.
    Lời giải và giải thích chi tiết:
    $2,4\times0,25+5,6:4+2\times\dfrac14\\=2,4\times\dfrac14+5,6\times\dfrac14+2\times\dfrac14\\=\dfrac14\times\left(2,4+5,6+2\right)\\=\dfrac14\times(8+2)\\=\dfrac14\times10\\=\dfrac52\\3,47\times\dfrac12-2,47:2+0,5\\=3,47\times\dfrac12-2,47\times\dfrac12+\dfrac12\\=\dfrac12\times(3,47-2,47+1)\\=\dfrac12\times(1+1)\\=\dfrac12\times2\\=1\\3,67\times0,125+4,66\times\dfrac1{16}+0,25\\=3,67\times\dfrac18+2,33\times2\times\dfrac1{16}+\dfrac14\\=3,67\times\dfrac18+2,33\times\dfrac18+\dfrac18\times2\\=\dfrac18\times(3,67+2,33+2)\\=\dfrac18\times8\\=1$

  2. Mình gửi bạn nha
    Cảm ơn đã chờ mình ạ
    $\text{2,4×0,25+5,6:4+2x$\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}$}$
    $\text{= 1}$
    ***
    $\text{3,67×0,125+4,66×1/16+0,25}$
    $\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}$}$
    $\text{=1}$
    $\text{#bich2k9}$^^

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Thảo