①0.175÷0.25×4
②10.7-2.9×0.2÷0.58
③19.89-6.63+1.11+3.37
④(2.5×8.8-2.5×0.8)×1.25
⑤9.36×64.5+3.65×93.6-9.36
⑥5.4÷2.5÷2.7
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