问题
解答题
(1)4÷
(2)1÷[(
(3)6÷
(4)
(5)(
(6)(19+
|
答案
(1)4÷
-4 5
÷44 5
=4×
-5 4
×4 5 1 4
=5-1 5
=4
;4 5
(2)1÷[(
-7 12
)×24]1 6
=1÷[
×24]5 12
=1÷10
=
;1 10
(3)6÷
+4÷2 3 1 3
=6×
+4×3 2 3 1
=9+12
=21;
(4)
×7 18
+1 4
÷3 4 18 7
=
+7 72
×3 4 7 18
=
+7 72 7 24
=28 72
=
;7 18
(5))(
+3 4
)÷2 9
-111 36
=
×36-1135 36
=35-11
=24;
(6))(19+
)×1 20
.1 18
=19×
+1 18
×1 20 1 18
=1
+1 18 1 360
=1
;7 120