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

Toán Lớp 7: a) $\frac{-3}{7}$.`2`$\frac{4}{11}$+$\frac{-3}{7}$.`4`$\frac{7}{11}$+$\sqrt{169}$ b)`6`$\frac{2}{7}$ : ($\frac{-3}{5}$) – `12`$\frac{2

Home/ Toán Lớp 7: a) $\frac{-3}{7}$.`2`$\frac{4}{11}$+$\frac{-3}{7}$.`4`$\frac{7}{11}$+$\sqrt{169}$ b)`6`$\frac{2}{7}$ : ($\frac{-3}{5}$) – `12`$\frac{2

Toán Lớp 7: a) $\frac{-3}{7}$.`2`$\frac{4}{11}$+$\frac{-3}{7}$.`4`$\frac{7}{11}$+$\sqrt{169}$ b)`6`$\frac{2}{7}$ : ($\frac{-3}{5}$) – `12`$\frac{2

Tháng Tám 11, 2022 Toán học 1 Comment 0 views

Toán Lớp 7: a) $\frac{-3}{7}$.2$\frac{4}{11}$+$\frac{-3}{7}$.4$\frac{7}{11}$+$\sqrt{169}$
b)6$\frac{2}{7}$ : ($\frac{-3}{5}$) – 12$\frac{2}{7}$ : ($\frac{-3}{5}$) + $\sqrt{144}$

Comments ( 1 )

  1. lanminhngoc
    lanminhngoc
    11 Tháng Tám, 2022 at 3:14 sáng
    Reply
    Giải đáp:
    $a. 10$
    $b. 22$
    Lời giải và giải thích chi tiết:
    $a. – \frac{3}{7}.2\frac{4}{11} – \frac{3}{7}.4\frac{7}{11} + \sqrt[]{169}$
    $= – \frac{3}{7}.( 2\frac{4}{11} + 4\frac{7}{11} ) + 13$
    $= – \frac{3}{7}.( 2 + \frac{4}{11} + 4 + \frac{7}{11} ) + 13$
    $= – \frac{3}{7}.( 6 + \frac{11}{11} ) + 13$
    $= – \frac{3}{7}.7 + 13$
    $= – 3 + 13$
    $= 10$
    $b. 6\frac{2}{7} : \frac{-3}{5} – 12\frac{2}{7} : \frac{-3}{5} + \sqrt[]{144}$
    $= ( 6\frac{2}{7} – 12\frac{2}{7} ) : \frac{-3}{5} + 12$
    $= ( 6 + \frac{2}{7} – 12 – \frac{2}{7} ) . \frac{-5}{3} + 12$
    $= – 6.\frac{-5}{3} + 12$
    $= 2.5 + 12$
    $= 10 + 12$
    $= 22$

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

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