100+6.23+3.68-37.75
=100+6.12+0.11+3.68-37.75
=100+(6.12+3.68)+0.11-37.75
=100+10+0.11-37.75
=110.11-37.75
=72.16
（11/16÷1/2+15/16）×8/9
=（11/16×2+15/16）×8/9
=（22/16+15/16）×8/9
=27/16×8/9
=3/2
8.1÷【（29/7-0.005×700）÷9/7】
=8.1÷【（29/7-7/2）×7/9】
=8.1÷（29/7×7/9-7/2×7/9）
=8.1÷（29/9-49/18）
=8.1÷1/2
=8.1x2
=16.2