问题
解答题
|
答案
(1)0.25×7.6+2.4×0.25,
=0.25×(7.6+2.4),
=0.25×10,
=2.5;
(2)(
-3 4
-1 2
)×24,1 6
=
×24-3 4
×24-1 2
×24,1 6
=18-12-4,
=6-4,
=2;
(3)15÷[(
+2 3
)×1 5
],1 13
=15÷[
×13 15
],1 13
=15÷
,1 15
=225;
(4)13
-35 11
-24 7
+23 7
,6 11
=(13
+25 11
)-(36 11
+24 7
),3 7
=16-6,
=10;
(5)
×25 8
+22 3
÷11 3
,1 3
=
+5 3
,7 4
=
;41 12
(6)13
×7 8
+61 16
÷16,1 8
=13
×7 8
+61 16
×1 8
,1 16
=(13
+67 8
)×1 8
,1 16
=20×
,1 16
=
.5 4