a. 7/4+13/4 b. 3/4÷1/2+1/2

Question

a. 7/4+13/4
b. 3/4÷1/2+1/2

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Khoii Minh 4 years 2021-04-29T11:52:38+00:00 2 Answers 13 views 0

Answers ( )

  1. Verity
    0
    2021-04-29T11:53:52+00:00
    Reply

    @Yena

    a.$\frac{7}{4}$ + $\frac{13}{4}$ = $\frac{20}{4}$ = 5

    b.$\frac{3}{4}$ : $\frac{1}{2}$ $\frac{1}{2}$ 

    =$\frac{3}{4}$ . 2 + $\frac{1}{2}$ 

    = $\frac{6}{4}$ + $\frac{1}{2}$ 

    =$\frac{3}{2}$ + $\frac{1}{2}$ 

    = $\frac{4}{2}$ 

    =2

     

  2. thienan
    0
    2021-04-29T11:53:53+00:00
    Reply

    a. $\dfrac{7}{4}$ + $\dfrac{13}{4}$ = $\dfrac{7+13}{4}$ = $\dfrac{20}{4}$ = 5

    b. $\dfrac{3}{4}$ : $\dfrac{1}{2}$ + $\dfrac{1}{2}$ 

    = $\dfrac{3}{4}$ .$\dfrac{2}{1}$ + $\dfrac{1}{2}$  

    = $\dfrac{6}{4}$ + $\dfrac{1}{2}$ 

    = $\dfrac{3}{2}$ + $\dfrac{1}{2}$ 

    = $\dfrac{4}{2}$ = 2

     

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )