Question

tính bằng cánh thuận tiện nhất 

7,15:0,5+7,15x9-7,15

Answer 1

= 7,15 x 2 + 7,15 x 9 - 7,15

= 7,15 x (9 + 2 - 1)

= 7,15 x 10

= 71,5

Answer 2

`7,15:0,5+7,15xx9-7,15`

`=7,15xx2+7,15xx9-7,15`

`=7,15xx(2+9-1)`

`=7,15xx10=71,5`

Answer 3

`=7,15xx2+7,15xx9-7,15xx1`

`=7,15xx(2+9-1)`

`=7,15xx10=71,5`

Answer 4

\(7,15:0,5+7,15\times9-7,15\)

\(=7,15\times2+7,15\times9-7,15\)

\(=7,15\times\left(2+9-1\right)\)

\(=7,15\times10\)

\(=71,5\)

Answer 5

7,15:0,5+7,15x9-7,15

= 7,15x2 + 7,15x9 - 7,15x1

= 7,15 x(2+9-1)

= 7,15x10

= 71,5

Answer 6

7,15 x 2 + 7,15 x 9 - 7,15

= 7,15 x (9 + 2 - 1)

= 7,15 x 10

= 71,5

Answer 7

`7,15:0,5+7,15xx9-7,15`

`=7,15 xx2+7,15xx9-7,15`

`=7,15xx(2+9-1)`

`=7,15xx10`

`=71,5`