问题
解答题
|
答案
(1)10.15-6.25-3.75,
=10.15-(6.25+3.75),
=10.15-10,
=0.15;
(2)1.75-(0.75+
),2 5
=1.75-0.75-0.4,
=1-0.4,
=0.6;
(3)9×
+11 8
×3,11 8
=(9+3)×
,11 8
=12×
,11 8
=
;33 2
(4)
+3 5
÷2 5
+3 5
,2 5
=(
+3 5
)+2 5
×2 5
,5 3
=1+
,2 3
=1
;2 3
(5)1
÷(2.5×1 8
),4 5
=
÷(9 8
×5 2
),4 5
=
÷2,9 8
=
×9 8
,1 2
=
;9 16
(6)6.48÷[(3.3-2.7)×0.9],
=6.48÷[0.6×0.9],
=6.48÷0.6÷0.9,
=10.8÷0.9,
=12.