问题
解答题
|
答案
(1)56×(
-3 7
),3 8
=56×
-56×3 7
,3 8
=24-21,
=3;
(2)9.75-3.42-5.58,
=9.75-(3.42+5.58),
=9.75-9,
=0.75;
(3)125×0.25×3.2,
=125×0.25×4×0.8,
=125×0.8×0.25×4,
=100×1,
=100;
(4)(
-3 5
)×1 4
,4 7
=
×3 5
-4 7
×1 4
,4 7
=
-12 35 1 7
=
-12 35
,5 35
=
;1 5
(5)
×3 8
+6 7
÷86 7
=
×3 8
+6 7
×6 7
,1 8
=
×(6 7
+3 8
),1 8
=
×6 7
,1 2
=
;3 7
(6)
+3 4
×1 4
,2 3
=
×(3+1 4
),2 3
=
×1 4
,11 3
=
.11 12