Question

tính nhanh 

41,65+8,25+8,35+9,45+21,75+10,55

 

Answer 1

41,65+8,25+8,35+9,45+21,75+10,55

= ( 41,65 + 8,35 ) + ( 8,25 + 21,75 ) + ( 9,45 + 10,55 )

= 50 + 30 + 20

= 50 + 50

= 100

Answer 2

   41,65+8,25+8,35+9,45+21,75+10,55=

= (41,65+8,35)+(8,25+21,75)+(9,45+10,55)

=        50        +      30        +       20

=       100.

Answer 3

41,65+8,25+8,35+9,45+21,75+10,55

=(41,65+8,35)+(8,25+21,75)+(9,45+10,55)

=50+30+20

=50+50

=100

học tốt^^

#Trịnh hằng

Answer 4

(41,65+8,35)+(8,25+21,75)+10,55 = 50+30+10,55 = 90,55

Answer 5

Nhầm, thiếu 9,45