CÁC BẠN PHẢI GHI PHÂN SỐ GIỐNG MÌNH NHA KO GHI 5/6 ĐỒ NHA , KHÓ ĐỌC LẮM $1)\frac{-5}{7}.$ $\frac{2}{11}+$ $\frac{-5}{7}.$ $\frac{9}{11}+1$ $\frac{5}{

CÁC BẠN PHẢI GHI PHÂN SỐ GIỐNG MÌNH NHA KO GHI 5/6 ĐỒ NHA , KHÓ ĐỌC LẮM
$1)\frac{-5}{7}.$ $\frac{2}{11}+$ $\frac{-5}{7}.$ $\frac{9}{11}+1$ $\frac{5}{7}$
$2)\frac{-3}{7}.$ $\frac{5}{11}+$ $\frac{-3}{7}.$ $\frac{6}{11}+2$ $\frac{3}{7}$
$3)\frac{-3}{5}.$ $\frac{2}{7}+$ $\frac{-3}{5}.$ $\frac{5}{7}+2$ $\frac{3}{5}$
$4)\frac{-3}{4}.$ $\frac{4}{7}+$ $\frac{-3}{5}.$ $\frac{3}{7}+$ $\frac{2}{-5}$
$5)(\frac{5}{7}.0,6+-5:3$ $\frac{1}{2}).(40 phần trăm -1,4).(-2)mũ ba$
$6)B=\frac{13}{15}.0,25.3+($ $\frac{8}{15}-$ $1\frac{19}{60}):1$ $\frac{23}{24}$

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  1. Đáp án:

    $1)$ $\dfrac{-5}{7}$$ .$ $\dfrac{2}{11}$ $+$ $\dfrac{-5}{7}$ $. $$\dfrac{9}{11}$ $+$ 1$\dfrac{5}{7}$

    $=$ $\dfrac{-5}{7}$$ .$ $\dfrac{2}{11}$ $+$ $\dfrac{-5}{7}$ $.$ $\dfrac{9}{11}$ $+$ $\dfrac{12}{7}$

    $=$ $\dfrac{-5}{7}$ $.$ ($\dfrac{2}{11}$ $+$ $\dfrac{9}{11}$ ) $+$ $\dfrac{12}{7}$

    $=$ $\dfrac{-5}{7}$ $. 1 +$ $\dfrac{12}{7}$

    $=$ $\dfrac{-5}{7}$ $+$ $\dfrac{12}{7}$

    $= 1$

    $2)$ $\dfrac{-3}{7}$ $. $$\dfrac{5}{11}$ $+$ $\dfrac{-3}{7}$ $.$ $\dfrac{6}{11}$ $+ 2$$\dfrac{3}{7}$

    $=$ $\dfrac{-3}{7}$ $. $$\dfrac{5}{11}$ $+$ $\dfrac{-3}{7}$ $.$ $\dfrac{6}{11}$ $+$ $\dfrac{17}{7}$

    $=$ $\dfrac{-3}{7}$$ .$ ($\dfrac{5}{11}$ $+$ $\dfrac{6}{11}$) $+$ $\dfrac{17}{7}$

    $=$ $\dfrac{-3}{7}$$ . 1 +$ $\dfrac{17}{7}$

    $=$ $\dfrac{-3}{7}$ $+$ $\dfrac{17}{7}$

    $= 2$

    $3)$ $\dfrac{-3}{5}$$ .$ $\dfrac{2}{7}$ $+$ $\dfrac{-3}{5}$$ .$ $\dfrac{5}{7}$ $+$ 2$\dfrac{3}{5}$

    $= $$\dfrac{-3}{5}$ $. $$\dfrac{2}{7}$ $+$ $\dfrac{-3}{5}$$ .$ $\dfrac{5}{7}$ $+$ $\dfrac{13}{5}$

    $=$ $\dfrac{-3}{5}$$. $($\dfrac{2}{7}$+$\dfrac{5}{7}$) $+ $$\dfrac{13}{5}$

    $=$ $\dfrac{-3}{5}$ $. 1 +$ $\dfrac{13}{5}$

    $=$ $\dfrac{-3}{5}$ $+$ $\dfrac{13}{5}$

    $= 2$

    $4)$ $\dfrac{-3}{4}$ $. $$\dfrac{4}{7}$ $+$ $\dfrac{-3}{5}$$ . $$\dfrac{3}{7}$ $+$ $\dfrac{2}{-5}$

    $=$ $\dfrac{-3}{7}$ $+$ $\dfrac{-9}{35}$ $+ $$\dfrac{2}{-5}$

    $=$ $\dfrac{-15+(-9)+(-14)}{35}$

    $=$ $\dfrac{-38}{35}$

    $5)$ ($\dfrac{5}{7}$$ . 0,6 + (-5):3$$\dfrac{1}{2}$ ) $.$ ($\dfrac{40}{100}$ $- 1,4).(-2)³$

    $=$ ($\dfrac{5}{7}$ $. 0,6 + (-5):$$\dfrac{7}{2}$ ) ($0,4 – 1,4$)$.$($-8$)

    $=$ ($\dfrac{3}{7}$ + $\dfrac{-10}{7}$ ) $(-1).(-8)$

    $= (-1).8$

    $= -8$

    $6) B=$$\dfrac{13}{15}$ . 0,25 . 3 $+$ ($\dfrac{8}{15}$ – 1$\dfrac{19}{60}$)$ : 1$$\dfrac{23}{24}$

    $=$ $\dfrac{13}{15}$ $. 0,25 . 3 +$ ($\dfrac{8}{15}$ $-$ $\dfrac{79}{60}$ ) $: $$\dfrac{47}{24}$

    $=$ $\dfrac{13}{15}$ $. 0,25 . 3 +$ $\dfrac{-47}{60}$ $. $$\dfrac{24}{47}$

    $= 0,65 + (-0,4)$

    $= 0,25$

    BẠN THAM KHẢO NHA!!!

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