Question

tính bằng cách thuận tiện nhất:

          2,78-9,34+3,22-5,66

Answer 1

bạn lên gole

Answer 2

= ( 2,78 + 3,22 ) - ( 9,34 + 5,66)

= 6 - 15

= - 9

Answer 3

Mizuki Kanzaki

\(2,78-9,34+3,22-5,66\)

\(=\left(2,78+3,22\right)-\left(9,34+5,66\right)\)

\(=6-15\)

\(=-9\)

Answer 4

2,78 - 9,34 + 3,22 - 5,66

Ko biết 

Answer 5

2,78 - 9,34 + 3,22 - 5,66

= ( 9,34 + 5,66  ) - ( 2,78 + 3,22 )

= 15 - 6

= 9

Answer 6

= -9 nha bạn 

Answer 7

\(2,78-9,34+3,22-5,66\)

\(=\left(2,78+3,22\right)-\left(9,34-3,22\right)\)

\(=6-15\)\(=-9\)