问题
解答题
|
答案
(1)(
+1 2
)×(3 4
-1 2
),1 3
=
×5 4
,1 6
=
;5 24
(2)
×7 5
+1.4÷1 11
,11 10
=
×7 5
+1 11
×7 5
,10 11
=(
+1 11
)×10 11
,7 5
=1×
,7 5
=
;7 5
(3)[
-(3 5
-3 4
)]÷4,2 3
=[
-3 5
]÷4,1 12
=
×31 60
,1 4
=
;31 240
(4)(
+3 4
)×12,5 12
=
×12+3 4
×12,5 12
=9+5,
=14;
(5)(12×
-5 6
)÷17 4
,1 4
=(10-
)×4,17 4
=10×4-
×4,17 4
=40-17,
=23;
(6)
×49+50×7 12
,5 12
=
×49+49×7 12
+5 12
,5 12
=49×(
+7 12
)+5 12
,5 12
=49×1+
,5 12
=49+
,5 12
=49
.5 12