问题
解答题
|
答案
(1)720+280÷5,
=720+56,
=776;
(2)36.5×1.4-8.51÷3.7,
=51.1-2.3,
=48.4;
(3)
÷1 2
-2 3
,2 5
=
×1 2
-3 2
,2 5
=
-3 4
,2 5
=
;7 20
(4)(156×
-26)×4 13
,8 11
=(48-26)×
,8 11
=22×
,8 11
=16;
(5)(
+4 3
)÷(2-5 2
),3 2
=
÷23 6
,1 2
=
×2,23 6
=
;23 3
(6)[4-(
-3 4
)]×3 8
,4 29
=[4-
]×3 8
,4 29
=
×29 8
,4 29
=
.1 2