怎样简便就怎样算.(1)1.5÷1.8+1.3×0.6(2)25×1.25×32(3)( 4 5 + 1 4 )

2024-12-17 07:39:37
推荐回答(1个)
回答1:

(1)1.5÷1.8+1.3×0.6,
=
5
6
+0.78,
= 1
46
75


(2)25×1.25×32,
=25×1.25×8×4,
=(25×4)×(1.25×8),
=100×10,
=1000;

(3)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=1.15;

(4)56×(
4
7
+
5
8
-
3
4
),
=56×
4
7
+56×
5
8
-56×
3
4

=32+35-42,
=67-42,
=25.