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

Toán Lớp 6: A)150+27+123 B)22+24+26+28+30 Tìm x X+1234 = 5678 3222-(x-235)=2357

Toán Lớp 6: A)150+27+123
B)22+24+26+28+30
Tìm x
X+1234 = 5678
3222-(x-235)=2357

Comments ( 2 )

  1. a ) 150 + 27 + 123 = 177 + 123 = 300
    b ) 22 + 24 + 26 + 28 + 30 = 2 . 11 + 2 . 12 + 2. 13 + 2 .14 + 2.15 = 2 . ( 11 + 12 + 13 + 14 + 15 ) = 2 . 65 = 130
    x + 1234 = 5678
                x = 5678 – 1234
                x = 4444
    Vậy x = 4444
    3222 – ( x – 235 ) = 2357
    x – 235 = 3222 – 2357
    x – 235 = 865
             x = 865 – 235
             x = 630
    Vậy x = 630
    #dtkc

  2.  
    Lời giải và giải thích chi tiết:
    A)150+27+123
    =150+(27+123)
    =150+100
    =300
    B)22+24+26+28+30
    =(22+28)+(24+26)+30
    =50 + 50 +30
    =100 + 30
    =130
    Tìm x
    x+1234 = 5678
           x    =5678-1234
            x   =4444
    3222-(x-235)=2357
             x-235   =3222-2357
             x -235   =865
             x            =865 +235
             x            =1100 

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