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2.7×【1÷{4.3-4.29}] =2.7×【1÷0.01】 =2.7×100 =270 1110÷{48×6分之5-8分之5)] =1110÷{40-8分之5] =1110÷39又8分之3 =1110÷0.375 =2960
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