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

Toán Lớp 6: `1,` a, `6/35.20/3` b, `-4/5:9/40` c, `(1/3+1/4-1/12):5/-24` d, `(3/4+4/5-5/6):(3/4-4/5+5/6)`

Tháng Hai 3, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: 1,
a, 6/35.20/3
b, -4/5:9/40
c, (1/3+1/4-1/12):5/-24
d, (3/4+4/5-5/6):(3/4-4/5+5/6)

Comments ( 2 )

  1. thanoanghha
    thanoanghha
    3 Tháng Hai, 2023 at 12:47 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
    a, 6/35*20/3=2/7*4/1=8/7
    b, (-4)/5:9/40=(-4)/5*40/9=(-4)/1*8/9=(-32)/9
    c, (1/3+1/4-1/12):5/-24
    =(7/12-1/12):5/-24
    =1/2:5/-24
    =1/2*(-24)/5
    =(-12)/5
    d, (3/4+4/5-5/6):(3/4-4/5+5/6)
    =(15/20+16/20-5/6):(15/20-16/20+5/6)
    =(31/20-5/6):((-1)/20+5/6)
    =(93/60-50/60):((-3)/60+50/60)
    =43/60:47/60
    =43/47

  2. daolanhoa
    daolanhoa
    3 Tháng Hai, 2023 at 12:46 sáng
    Reply
    1)
    a) 6/35 . 20/3
    =\frac{6.20}{35.3}
    = \frac{2.4}{7.1}
    = 8/7
    b) -4/5 : 9/40
    = -4/5 . 40/9
    = \frac{-4.40}{5.9}
    =\frac{-4.8}{1.9}
    = -32/9
    c) (1/3 + 1/4 – 1/2) : 5/-24
    = (4/12 + 3/12 – 6/12) . -24/5
    = 1/2 . (-24/5)
    = \frac{1.(-24)}{2.5}
    = -12/5
    d) (3/4 + 4/5 – 5/6) : (3/4 – 4/5+ 5/6)
    =(45/60 +48/60-50/60) : (45/60 – 48/50 + 50/60)
    = 43/60 :  47/60
    = 43/47

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

An Kim

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