42.5-(22.17+7.83)怎么列脱式?
3个回答
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解:42.5-(22.17+7.83)等于( 25/2 ),【即等于12.5】
∵已知需求出42.5-(22.17+7.83)等于多少
∴42.5 - (22.17 + 7.83)
= 42.5 - 22.17 - 7.83
= (42×10+5)/10 - (22×100+17)/100 - (7×100+83)/100
= 425/10 - 2217/100 - 783/100
= 4250/100 - 2217/100 - 783/100
= 2033/100 - 783/100
= 1250/100
= 25/2
= 12.5
答:42.5-(22.17+7.83)等于25/2,【即等于12.5】
∵已知需求出42.5-(22.17+7.83)等于多少
∴42.5 - (22.17 + 7.83)
= 42.5 - 22.17 - 7.83
= (42×10+5)/10 - (22×100+17)/100 - (7×100+83)/100
= 425/10 - 2217/100 - 783/100
= 4250/100 - 2217/100 - 783/100
= 2033/100 - 783/100
= 1250/100
= 25/2
= 12.5
答:42.5-(22.17+7.83)等于25/2,【即等于12.5】
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