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| (1)1.18×2.58+0.5+1.42×1.18 =1.18×(2.58+1.42)+0.5 =1.18×4+0.5 =4.72+0.5 =5.22; (2)(21.85-17.5)×(0.45÷0.9) =4.35×0.5 =2.175; (3)1.75×(0.1÷0.2)-0.18÷0.9 =1.75×0.5-0.2 =0.875-0.2 =0.675; (4)93.6÷[(54.8+45.2)×(6-5.46)] =93.6÷[100×0.54] =93.6÷54 =
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