25,7 + 9,48 + 14,3 b, 8,24 + 3,69 + 2,31 38,25 – 18,25 + 21,64 11,64 + 9,93 45,28

2 bình luận về “25,7 + 9,48 + 14,3 b, 8,24 + 3,69 + 2,31 38,25 – 18,25 + 21,64 11,64 + 9,93 45,28”

1. a. 25,7+9,48+14,3

   =(25,7+14,3)+9,48

   =40+9,48

   =49,48

   b. 8,24 + 3,69 + 2,31

   =(3,69+2,31)+8,24

   =6+8,24

   =14,24

   c. 38,24+3,69+2,31

   =(38,25-18,25)+21,64

   =20+21,64

   =41,64

   d. 11,64 + 9,93

   =21,57

   e. 45,28 + 52,17

   =97,45

   f. 15,28-12,1

   =2,18

   $#Sano$

    

   Trả lời
2. a) 25,7+9,48+14,3

   = (25,7+14,3)+9,48

   = 40+9,48

   = 49,48

   b) 8,24+3,69+2,31

   = 8,24+(3,69+2,31)

   = 8,24+6

   = 14,24

   c) 38,25-18,25+21,64

   = ( 38,25-18,25)+21,64

   = 20+21,64

   = 41,64

   d) 11,64+9,93

   = 21,57

   e) 45,28+52,17

   = 97,45

   f) 15,28-12,1

   = 2,18

    

   Trả lời