问题
解答题
|
答案
+1 4
×5 8 4 5
=
+1 4 1 2
=
;3 4
×3 5
+1 4
×3 4 3 5
=
×(3 5
+1 4
)3 4
=
×13 5
=
;3 5
15×(
+1 5
)1 3
=15×
+15×1 5 1 3
=3+5
=8;
÷13+7 10
×12 13 7 10
=
×(7 10
+1 13
)12 13
=
×17 10
=
.7 10