问题
解答题
|
答案
(1)200-180÷15×2,
=200-12×2,
=200-24,
=176;
(2)46.71-6.81-3.19,
=46.71-(6.81+3.19),
=46.71-10,
=36.71;
(3)
×15×3 5
,2 9
=9×
,2 9
=2;
(4)
÷(1 3
-2 3
)×2 5
,3 5
=
÷1 3
×4 15
,3 5
=
×1 3
×15 4
,3 5
=
;3 4
(5)
×5 13
+1 7
÷6 7
,13 5
=
×5 13
+1 7
×6 7
,5 13
=
×(5 13
+1 7
),6 7
=
×1,5 13
=
;5 13
(6)
÷[(9 8
+2 5
)×1 10
],3 4
=
÷[9 8
×1 2
],3 4
=
÷9 8
.3 8
=
×9 8
,8 3
=3.