① 15 16 ÷ 3 8 ÷ 5 6 ② 9 13 ÷ 15 26 × 5 6 ③ 3 5 ÷3+ 1 3 × 4 5

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  • (1)

    15

    16 ÷

    3

    8 ÷

    5

    6 ,

    =

    15

    16 ×

    8

    3 ÷

    5

    6 ,

    =

    5

    2 ×

    6

    5 ,

    =3;

    (2)

    9

    13 ÷

    15

    26 ×

    5

    6 ,

    =

    9

    13 ×

    26

    15 ×

    5

    6 ,

    =1;

    (3)

    3

    5 ÷3+

    1

    3 ×

    4

    5 ,

    =

    3

    5 ×

    1

    3 +

    1

    3 ×

    4

    5 ,

    =

    1

    3 ×

    7

    5 ,

    =

    7

    15 ;

    (4)(

    1

    2 +

    3

    8 )÷

    3

    4 ;

    =

    7

    8 ×

    4

    3 ,

    = 1

    1

    6 ;

    (5)

    3

    10 ÷x=

    3

    5 ;

    3

    5 x=

    3

    10 ,

    3

    5 x÷

    3

    5 =

    3

    10 ÷

    3

    5 ,

    x=

    1

    2 ;

    (6)(1-

    3

    4 )x=2,

    1

    4 x=2,

    1

    4 x÷

    1

    4 =2÷

    1

    4 ,

    x=8.