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

Toán Lớp 7: Tính: `c) √(0,001)² =` `d) √(-0,001)² =` `e) √25/36 =` `f) -√64/81 =` `g) √121/100 =` `h) -√30/225 =`

Toán Lớp 7: Tính:
c) √(0,001)² =
d) √(-0,001)² =
e) √25/36 =
f) -√64/81 =
g) √121/100 =
h) -√30/225 =

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    c)
    $\sqrt{(0,001)^{2}}$$=|0,001|=0,001$
    d)
    $\sqrt{(-0,001)^{2}}$$=|-0,001|=-(0,001)=0,001$
    e)
    $\sqrt{\frac{25}{36}}$=$\frac{\sqrt{25}}{\sqrt{36}}$= $\frac{5}{6}$ 
    f)
    $-\sqrt{\frac{64}{81}}$=$-\frac{\sqrt{64}}{\sqrt{81}}$= $-\frac{8}{9}$ 
    g)
    $\sqrt{\frac{121}{100}}$=$\frac{\sqrt{11}}{\sqrt{10}}$= $\frac{11}{10}$ 
    h)
    $-\sqrt{\frac{30}{225}}$=$-\frac{\sqrt{30}}{\sqrt{\sqrt{225}}}$= $-\frac{\sqrt{30}}{15}$ 

  2. c)
    \sqrt{(0,001)^2}
    = 0,001
    d)
    \sqrt{(-0,001)^2}
    = 0,001
    e)
    \sqrt{25/36}
    = 5/6
    f)
    – \sqrt{64/81}
    = -8/9
    g)
    \sqrt{121/100}
    = 11/10
    h)
    – \sqrt{30/225}
    = (-\sqrt{30})/15

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

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