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

Toán Lớp 7: a,-6/21 . 3/2 b,(-3).(-7/12) c,(11/12 : 33/16).3 e, √(-7)^2 + √25/16 -3/2 F,1/2. √100 – √1/6 + (1/3)^0

Tháng Sáu 2, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: a,-6/21 . 3/2
b,(-3).(-7/12)
c,(11/12 : 33/16).3
e, √(-7)^2 + √25/16 -3/2
F,1/2. √100 – √1/6 + (1/3)^0

Comments ( 2 )

  1. tuyetnhungthu
    tuyetnhungthu
    2 Tháng Sáu, 2022 at 3:28 sáng
    Reply
    a)$\dfrac{-6}{21}$ .$\dfrac{3}{2}$ =$\dfrac{-18}{42}$ =$\dfrac{-3}{7}$ 
    b)(-3).$\dfrac{-7}{12}$ =$\dfrac{7}{4}$ 
    c)($\dfrac{11}{12}$ :$\dfrac{33}{16}$ ).3
    =$\dfrac{4}{9}$  .3
    =$\dfrac{4}{3}$ 
    d) $\sqrt{(-7)^2}$ + $\sqrt{\dfrac{25}{16}}$ -$\dfrac{3}{2}$ 
    =7+$\dfrac{5}{4}$  – $\dfrac{3}{2}$ 
    = $\dfrac{27}{4}$ 
    f) $\dfrac{1}{2}$ .$\sqrt{100}$ -$\sqrt{\dfrac{1}{16}}$+($\dfrac{1}{3})^o$
    =$\dfrac{1}{2}$ .10 – $\dfrac{1}{4}$  .1
    =5+ $\dfrac{3}{4}$ 
    = $\dfrac{23}{4}$ 

  2. phuongthaongoc
    phuongthaongoc
    2 Tháng Sáu, 2022 at 3:28 sáng
    Reply
    Lời giải chi tiết:
    a) -6/(21).(3)/2
    =-2/(7).(3)/2
    =-3/7
    b) (-3).(-7)/12
    =(3.7)/(3.4)
    =7/4
    c) (11/12:33/16).3
    =(11/(12).(16)/33).3
    =4/(9).3
    =4/3
    e) \sqrt{(-7)^2}+\sqrt{\frac{25}{16}}-3/2
    =7+5/4-3/2
    =7+(-1/4)
    =27/4
    f) 1/2.\sqrt{100}-\sqrt{\frac{1}{16}}+(1/3)^0
    =1/(2).10-1/4+1
    =5-1/4+1
    =6-1/4
    =23/4

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

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