问题
解答题
|
答案
-(3 4
+1 5
)×1 3 9 8
=
-3 4
×8 15 9 8
=
-3 4 3 5
=
;3 20
×2 5
-3 4
÷41 2
=
-3 10 1 8
=
;7 40
×[1÷(5 8
+3 4
)]1 3
=
×[1÷5 8
]13 12
=
×5 8 12 13
=
;15 26
[
-(1 6
-5 14
)]×1 3 7 9
=[
-1 6
]×1 42 7 9
=
×1 7 7 9
=
.1 9