问题
解答题
计算下面各题. (1)10
(2)7.2÷4÷0.9 (3)
(4)(
|
答案
(1)10
-(3 4
+33 4
),2 5
=10
-3 4
-33 4
,2 5
=10-3
,2 5
=6
;3 5
(2)7.2÷4÷0.9,
=7.2÷(4×0.9),
=7.2÷3.6,
=2;
(3)
+8×(2 3
-7 8
),5 6
=
+8×2 3
-8×7 8
,5 6
=
+7-2 3
,20 3
=7
-62 3
,2 3
=1;
(4)(
+1 2
)÷3 4
×5 6
,3 5
=
÷5 4
×5 6
,3 5
=
×3 2
,3 5
=
.9 10