13.65÷7.5的验算怎么验算?
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解:13.65÷7.5等于( 91/50 ),【即等于1.82】
∵已知需求出13.65÷7.5等于多少
X ÷ Y = Z,即X = Z × Y
∴13.65 ÷ 7.5
= (13×100+65)/100 ÷ (7×10+5)/10
= 1365/100 ÷ 75/10
= 273/20 ÷ 15/2
= 273/20 × 2/15
= 91/50
= 1.82
经检验,13.65 = 1.82 × 7.5符合题意
答:13.65÷7.5等于91/50,【即等于1.82】
∵已知需求出13.65÷7.5等于多少
X ÷ Y = Z,即X = Z × Y
∴13.65 ÷ 7.5
= (13×100+65)/100 ÷ (7×10+5)/10
= 1365/100 ÷ 75/10
= 273/20 ÷ 15/2
= 273/20 × 2/15
= 91/50
= 1.82
经检验,13.65 = 1.82 × 7.5符合题意
答:13.65÷7.5等于91/50,【即等于1.82】
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