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Mathematics

7th

grade

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Q7 3

11
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10 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt

     25(12+232)=\frac{\sqrt{2}}{5}\cdot\left(\frac{1}{\sqrt{2}}+\frac{2}{3\sqrt{2}}\right)=  

     526\frac{5\sqrt{2}}{6}  

     13\frac{1}{3}  

     16\frac{1}{6}  

     546\frac{5\sqrt{4}}{6}  

  • 2. Multiple Choice
    30 seconds
    1 pt

    Dintre numerele

     8, 3, 23 , 27-8,\ 3,\ 2\sqrt{3\ },\ \frac{2}{7}  irational este....

    -8

     27\frac{2}{7}  

     33  

     232\sqrt{3}  

  • 3. Multiple Choice
    30 seconds
    1 pt

    Fie dreptunghiul ABCD . Diagonala AC este egala cu 10 cm. Atunci lungimea diagonalei BD este egala cu.....cm.

    10

    10210\sqrt{2}

    10310\sqrt{3}

    20

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