①15.74-4.3-5.7+4.26
②7.6×4.3+0.43×23+0.43
③8.88×1250
④40.9÷0.25
⑤0.25×(4-0.8)×1.25
⑥3.72-0.72×[0.1÷(15.9-15.85)]