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

Toán Lớp 6: a. (2+4+6+…+98+100)*(36*333-111*108) ; b.19*27+47*81+19*20 ; c.87*23+13*93+70*87

Toán Lớp 6: a. (2+4+6+…+98+100)*(36*333-111*108) ; b.19*27+47*81+19*20 ; c.87*23+13*93+70*87

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     Kkkk

    toan-lop-6-a-2-4-6-98-100-36-333-111-108-b-19-27-47-81-19-20-c-87-23-13-93-70-87

  2. a) ( 2 + 4 + 6 + … + 98 + 100) xx ( 36 xx 333 – 111 xx 108)
    = ( 2 + 4 + 6 + … + 98 + 100) xx ( 36 xx 3  xx 111 – 111 xx 108)
    = ( 2 + 4 + 6 + … + 98 + 100) xx ( 108 xx 111 – 111 xx 108)
    = ( 2 + 4 + 6 + … + 98 + 100) xx 0
    = 0
    b) 19 xx 27 + 47 xx 81 + 19 xx 20
    = 19 xx ( 27 + 20) + 47 xx 81
    = 19 xx 47 + 47 xx 81
    = ( 19 + 81) xx 47
    = 100 xx 47
    = 4700
    c) 87 xx 23 + 13 xx 93 + 70 xx 87
    = 87 xx ( 23 + 70) + 13 xx 93
     = 87 xx 93 + 13 xx 93
    = ( 87 + 13) xx 93
    = 100 xx 93
    = 9300
    #caty09

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