①(0.32+5.6)÷0.8
②21.3×4+8×2.5
③4.8÷1.2÷0.4
④78.9-2.67÷2÷0.267
①7.8×(4.7-3.627÷0.9)
②3.76÷0.4÷0.25
③7.9+21.21÷2.1
④2×(0.5+0.125)×8
⑤3.7×101
⑥3÷7.5+3÷2.5
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]