1樓:鳳凰涅槃丶吡
(dao1)360÷6-35,
回=60-35,
=25;
(2)15+19×4,
=15+76,
=91;
(3)69+300÷3,
=69+100,
=169;
(4)40×5+20,
=200+20,
=220;
(5)(答20+40)÷6,
=60÷6,
=10;
(6)(90-10)÷8,
=80÷8,
=10;
(7)200-90÷9,
=200-10,
=190;
(8)90-80÷2,
=90-40,
=50;
(9)65-90÷3,
=65-30,
=35.
1/4×(4.85÷5/18-3.6+6.15×3又3/5)+[5.5-1.75×(1又2/3+19/21)]
2樓:匿名使用者
答案是9-1=8 我用計算器算的 沒有過程 抱歉
3樓:山竹口花奈
1/4*(4.85÷5/18-3.6+6.15*3又3/5)+[5.5-1.75*(1又2/3+19/21)]
= 1/4×[(4.85×18/5+6.15×18/5)-3.6]+[5.5-1.75×(5/3+19/21)]
= 1/4×[(4.85+6.15)×18/5-3.6]+[5.5-1.75×(35/21+19/21)]
= 1/4×[11×18/5-3.6]+[5.5-7/4×54/21]
= 1/4×[39.6-3.6]+[5.5-4.5]
= 1/4×36+1
=9+1
=10求肯定!!!!!!!!!!!!!!!!!!!!!!!!
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