计算(1)10÷3.14-6.86
计算(1)10÷3.14-6.86÷3.14(2)34+934+9934+99934....
计算(1)10÷3.14-6.86÷3.14(2)34+934+9934+99934.
展开
(1)10÷3.14-6.86÷3.14,
=(10-6.86)÷3.14,
=3.14÷3.14,
=1;
(2)
+9
+99
+999
,
=(9+99+999)+
×4,
=(10-1+100-1+1000-1)+3,
=1110+3-3,
=1110.
收起
为你推荐: