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

Toán Lớp 7: thực hiện phép tính √36 – 3 √1/4 + | -3/2| [-1/2]^3 – 7/8 : 7/4 + | -9/8| + √81

Toán Lớp 7: thực hiện phép tính
√36 – 3 √1/4 + | -3/2|
[-1/2]^3 – 7/8 : 7/4 + | -9/8| + √81

Comments ( 2 )

  1. $\sqrt{36}$ $-$ $3$$\sqrt{\dfrac{1}{4}}$ $+$ $|$ $\dfrac{-3}{2}$ $|$
    $=$ $6$ $-$ $3$. $\dfrac{1}{2}$ + $\dfrac{3}{2}$ 
    $=$ $6$ $-$ $\dfrac{3}{2}$ + $\dfrac{3}{2}$ 
    $=$ $6$
    $( \dfrac{-1}{2} )^3$ $-$ $\dfrac{7}{8}$ : $\dfrac{7}{4}$ $+$ | $\dfrac{-9}{8}$ | $+$ $\sqrt{81}$
    $=$ $\dfrac{-1}{8}$ $-$ $\dfrac{1}{2}$ $+$ $\dfrac{9}{8}$ $+$ $9$
    $=$ ( $\dfrac{-1}{8}$ $+$ $\dfrac{9}{8}$ ) $-$ $\dfrac{1}{2}$ $+$ $9$ 
    $=$ $1$ $-$ $\dfrac{1}{2}$ $+$ $9$ 
    $=$ $\dfrac{1}{2}$ $+$ $9$
    $=$ $9$$\dfrac{1}{2}$

  2. =6-3×1/2+3/2
    =6-3/2+3/2
    =6

    = -1/8-7/8×4/7+9/8+9
    = -1/8-1/2+9/8+9
    = 19/2
    Đáo án cx có thể viết là 9 một phần 2 nha.

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

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