问题
解答题
|
答案
(1)5400-2940÷28,
=5400-105,
=5400-(100+5),
=5400-100-5,
=5295;
(2)389×42.7+389×57.3,
=389×(42.7+57.3),
=389×100,
=38900;
(3)(
+1 9
)÷4+1 27
,23 27
=
×4 27
+1 4
,23 27
=
+1 27
,23 27
=
;8 9
(4)1÷(0.75+
)×1 3
,13 24
=1÷(
+3 4
)×1 3
,13 24
=1÷
×13 12
,13 24
=
×12 13
,13 24
=
;1 2
(5)
+1 3
+3 8
+2 3
,5 8
=(
+1 3
)+(2 3
+3 8
),5 8
=1+1,
=2.