=2.4×（4.9+3）+7.9+7.6+1=2.4×7.9+7.9+7.6+1=7.9×（2.4+1）+7.6+1=7.9×3.4+7.6+1=7.9×3.4+8.6=（8－0.1）×3.4+8.6=27.2－0.34+8.6=35.46
