问题
解答题
|
答案
①(
+1 2
+1 6
)×121 12
=
×12+1 2
×12+1 6
×121 12
=6+2+1
=9;
②
+(15 16
-7 16
)÷1 4 1 12
=
+15 16
×123 16
=
+15 16 36 16
=
;51 16
③
÷9+18 19
×1 19 1 9
=
×(1 9
+18 19
)1 19
=
×11 9
=
;1 9
④
÷(1-1 3
)×5 6 3 4
=
×6×1 3 3 4
=
.3 2