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

Toán Lớp 5: Tính nhanh : 7,2 :2 x 28,6+1,43 x 2 x 64 ============ 2+2+4

Tháng Ba 4, 2023 Toán học 1 Comment 0 views

Toán Lớp 5: Tính nhanh : 7,2 :2 x 28,6+1,43 x 2 x 64
————————————
2+2+4+6+10+…+68+110

Comments ( 1 )

  1. maitrucloan
    maitrucloan
    4 Tháng Ba, 2023 at 7:24 sáng
    Reply
    Tính nhanh
    (7,2 :2 . 28,6+1,43 . 2 . 64 )/ (2+2+4+6+10+…+68+110)
    =(3,6.28,6.2,86.10.6,4)/ (2+2+4+6+10+16+26+42+68+110)
    =((3,6+6,4).28,6)/((2+2+4)+(6+10+16)+(26+42+68)+110)
    = (10.28,6)/(4.2+16.2+68.2+110)
    = 286/((4+16+68).2+110)
    = 286/(88.2+11.10)
    = 286/(11.(16+10)
    = 286/(11.26)
    = 286/286=1
    Vậy  kết  quả  =1
    #Karis257

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

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