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

Toán Lớp 5: Write the sum as a product of 2 factors: a. 132 + 77 + 198 b. 5555 + 6767 + 7878 c. 1997, 1997 + 1998, 1998 + 1999, 1999

Toán Lớp 5: Write the sum as a product of 2 factors:
a. 132 + 77 + 198
b. 5555 + 6767 + 7878
c. 1997, 1997 + 1998, 1998 + 1999, 1999

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     a) 132+77+198
    =209+198
    =407
    b)5555+6767+7878
    =12322+7878
    =20200
    c) 1997,1997+1998,1998+1999,1999
    =3995,3995+1999,1999
    =5994,5994

  2. # tcv
    a ,
    132 + 77 + 198
    = 12 xx 11 + 7 xx 11 + 18 xx 11
    = 11 xx ( 12 + 7 + 18 )
    = 11 xx 37
    b ,
    5555 + 6767 + 7878
    = 55 xx 101 + 67 xx 101 + 78 xx 101
    = 101 xx ( 55 + 67 + 78 )
    = 101 xx 200
    c ,
    1997,1997 + 1998,1998 + 1999,1999
    = 0,0001 xx 19971997 + 0,0001 xx 19981998 + 0,0001 xx 19991999
    = 0,0001 xx ( 19971997 + 19981998 + 19991999 )
    = 0,0001 xx 59945994

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

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