Bài 1:Tính. a,2/3 +3/5;59+5/6;3/15+2/5. b,7/12-1/5;23/24-10/121;5/8-1/6. c,12+13+1/5. d,5-2/3;18/7-2;3/11+6;17+5/9.

0 bình luận về “Bài 1:Tính. a,2/3 +3/5;59+5/6;3/15+2/5. b,7/12-1/5;23/24-10/121;5/8-1/6. c,12+13+1/5. d,5-2/3;18/7-2;3/11+6;17+5/9.”

1. a.2/3+3/5+=10/15+9/15=19/15

   59+5/6=354/6+5/6=359/6

   3/15+2/5=3/15+6/15=3/5

   b.7/12-1/5=35/60-12/60=23/60

   23/24-10/121=2783/2904-240/2904=2543/2904

   5/8-1/6=15/24-4/24=11/24

   c.12+13+1/5=25+1/5=25,2

   d.5-2/3=15/3-2/3=13/3 

   18/7-2=18/7-14/7=4/7

   3/11+6=3/11+66/11=69/11

   17+5/9=152/9+5/9=157/9

    

    

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