问题
解答题
计算:
|
答案
×1 2
+1 77
×1 3
+1 77
×1 4
+1 77
×1 5
,1 77
=(
+1 2
+1 3
+1 4
)×1 5
,1 77
=(
+30 60
+20 60
+15 60
)×12 60
,1 77
=
×77 60
,1 77
=
.1 60
计算:
|
×1 2
+1 77
×1 3
+1 77
×1 4
+1 77
×1 5
,1 77
=(
+1 2
+1 3
+1 4
)×1 5
,1 77
=(
+30 60
+20 60
+15 60
)×12 60
,1 77
=
×77 60
,1 77
=
.1 60