问题
解答题
|
答案
3.2×1.25×0.25,
=(0.8×1.25)×(4×0.25),
=1×1,
=1;
5.8×[1÷(2.1-2.09)],
=5.8×[1÷0.01],
=5.8×100,
=580;
×101-31 50
,31 50
=
×(101-1),31 50
=
×100,31 50
=62;
42÷(
+1 2
),2 3
=42÷
,7 6
=42×
,6 7
=36;
×3 4
+7 8
×75%,1 8
=0.75×(
+7 8
),1 8
=0.75×1,
=0.75;
(
-7 8
)×(5 16
+5 9
),2 3
=
×9 16
,11 9
=
.11 16