问题
解答题
计算.(能简算的要简算) 3.68×[1÷(2.1-2.09)] 5
4-[3.75×(1.2-
|
答案
(1)3.68×[1÷(2.1-2.09)]
=3.68×[1÷0.01],
=3.68×100,
=368;
(2)5
÷12 3
+4 5
×54 9
+52 3 2 3
=5
×2 3
+5 9
×54 9
+52 3
,2 3
=(
+5 9
+1)×54 9
,2 3
=2×5
,2 3
=11
;1 3
(3)4-[3.75×(1.2-
)+1 3
]3 4
=4-[
×(15 4
-6 5
)+1 3
],3 4
=4-[
×15 4
+13 15
],3 4
=4-[
+13 4
],3 4
=4-4,
=0;
(4)9÷(
+7 9
)×24 9 3 4
=9÷
×11 9
,11 4
=9×
×9 11
,11 4
=20
.1 4