
(54.4-17.5)×0.45简便计算
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(54.4-17.5)×0.45
=(57.5-17.5-3.1)×0.45
=(54-17+0.4-0,5)×0.45
=(37-0.1)×9÷20
=(37×9-0.9)÷20
=(37×10-37-0.9)÷20
=(370-37-0.9)÷20
=332.1÷20
=16.605
=(57.5-17.5-3.1)×0.45
=(54-17+0.4-0,5)×0.45
=(37-0.1)×9÷20
=(37×9-0.9)÷20
=(37×10-37-0.9)÷20
=(370-37-0.9)÷20
=332.1÷20
=16.605
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