15-7=
8+7=
6+8=
14-( )=( )
16-8=
( )+( )=( )
9+9=
( )-( )=( )
①3248÷16﹣8.4×2.5
②4.8×(+﹣)
③2.5×96
④64.8÷(22.4﹣1.7﹣15.3)
⑤×[14÷(﹣)]
⑥(+)÷×3.6