A, 173+246+27+154 B, 25.5.9.8.2.4.3 C,48.25+48.41+48.34 D,50.16+84.150 E,2011.9+2011 Ê,10+11+12+….+19+20 G,27+999.27

Bởi

A, 173+246+27+154
B, 25.5.9.8.2.4.3
C,48.25+48.41+48.34
D,50.16+84.150
E,2011.9+2011
Ê,10+11+12+….+19+20
G,27+999.27

0 bình luận về “A, 173+246+27+154 B, 25.5.9.8.2.4.3 C,48.25+48.41+48.34 D,50.16+84.150 E,2011.9+2011 Ê,10+11+12+….+19+20 G,27+999.27”

  2.  173+246+27+154

    = ( 173 + 27 ) + ( 246 + 154 )

    = 200 + 400 = 600

      25.5.9.8.2.4.3

    = ( 25 . 4 ) ( 5 . 2 ) ( 9 . 8 . 3 )

    = 100 . 10 . 216 = 1000 . 216 = 216 000

      48.25+48.41+48.34

    = 48 ( 25 + 41 + 34 )

    = 48 . 100 = 4800

      50.16+84.150

    = 50 . 16 + 84 . 3 . 50

    = 50 . 16 + 252 . 50

    = 50 . ( 16 + 252 )

    = 50 . 268 = 13 400

      2011.9+2011

    = 2011 ( 9 + 1 ) = 2011 . 10 = 20 110

      10+11+12+….+19+20

    = ( 20 – 10 + 1 ) . ( 20 + 10 ) : 2

    = 11 . 30 : 2

    = 330 : 2 = 165

      27+999.27

    = 27 ( 999 + 1 ) = 27 . 1000 =27 000

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