a, 1,29.(2,59-4,71)+4,71.(1,29+2,29) b, 2,375.(4,925+1,37)-4,925.(2,375-1,37)

1 bình luận về “a, 1,29.(2,59-4,71)+4,71.(1,29+2,29) b, 2,375.(4,925+1,37)-4,925.(2,375-1,37)”

1. a) 

   1,29xx(2,56-4,71)+4,71xx(1,29+2,29)

   =1,29xx[2,56+(-4,71)]+4,71xx3,58

   =1,29xx(-2,15)+16,8618

   =-2,7735+16,8618

   =14,0883

   b) 

   2,375xx(4,925+1,37)-4,925xx(2,375-1,37)

   =2,375xx6,295-4,925xx1,005

   =14,950625-4,949625

   =10,001

   Trả lời