竖式计算并验算 0.542X3.5 45/2.50.542X3.5和45/2.5要验算

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竖式计算并验算0.542X3.545/2.50.542X3.5和45/2.5要验算竖式计算并验算0.542X3.545/2.50.542X3.5和45/2.5要验算竖式计算并验算0.542X3.545

竖式计算并验算 0.542X3.5 45/2.50.542X3.5和45/2.5要验算
竖式计算并验算 0.542X3.5 45/2.5
0.542X3.5和45/2.5要验算

竖式计算并验算 0.542X3.5 45/2.50.542X3.5和45/2.5要验算
(1)0.542×3.5=0.271×2×3.5
=0.271×7
=1.897
(2)45/2.5=45×4/(2.5×4)=180/10=18.