例1 求下列各组数的平均数:
(1)6,1,3,10,9,7;
(2)29,39,31,37,38,36.
(1)6,1,3,10,9,7;
(2)29,39,31,37,38,36.
答案:解:$(1)\frac {6+1+3+10+9+7}6=6$
$(2)\frac {29+39+31+37+38+36}6=35$
$(2)\frac {29+39+31+37+38+36}6=35$
解析:
(1)$(6+1+3+10+9+7)÷6=36÷6=6$
(2)$(29+39+31+37+38+36)÷6=210÷6=35$
(2)$(29+39+31+37+38+36)÷6=210÷6=35$