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

Toán Lớp 7: a) 5/9.(1/11-5/12)+5/9.(1/15-2/3) b) 3/8.27 1/5-51 1/5.38+19 c)

Home/ Toán Lớp 7: a) 5/9.(1/11-5/12)+5/9.(1/15-2/3) b) 3/8.27 1/5-51 1/5.38+19 c)

Toán Lớp 7: a) 5/9.(1/11-5/12)+5/9.(1/15-2/3) b) 3/8.27 1/5-51 1/5.38+19 c)

Tháng Bảy 23, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: a) 5/9.(1/11-5/12)+5/9.(1/15-2/3)
b) 3/8.27 1/5-51 1/5.38+19
c)

Comments ( 2 )

  1. tuyethutanhthu
    tuyethutanhthu
    23 Tháng Bảy, 2022 at 1:09 sáng
    Reply
    a) 5/9 . (1/11 – 5/12) + 5/9 . (1/15-2/3)
    = 5/9 . [ (1/11 – 5/12 ) + (1/15-2/3) ]
    = 5/9 . ( -611/660 )
    = -611/1188
    b) 3/8 . 271/5 – 511/5 . 38 + 19
    = 3/8 . ( 271/5 – 511/5 ) + 19
    = 3/8 . ( -48 ) + 19
    = 1

  2. haianhtu97
    haianhtu97
    23 Tháng Bảy, 2022 at 1:08 sáng
    Reply
    #huy
    a) 5/9.(1/11-5/12)+5/9.(1/15-2/3)
    =5/9. ((-3)/22)+5/9 . ((-3)/5)
    =5/9.((-3)/22+(-3)/5)
    =5/9 . (-81)/110
    =(-9)/20
    b) 3/8. 27 1/5-51 1/5. 38+19
    =3/8 . (-24) .38+19
    =3/8 . (-912) +19
    =(-342)+19
    =-323

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

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