脱式计算．
①8.82×15﹣100           ②15.8﹣+14.2﹣，         ③21.6﹣0.8×4÷0.8×4
④3×3.7+3.6+5.3×3         ⑤5+0.45÷0.9﹣1.75              ⑥1110÷[56×（﹣）]