计算下面各题,能简算的要用简便方法计算.(1)0.75×99+0.75 (2)56-(23-16) (3)(8.5-4)×(0

2024-11-29 00:33:40
推荐回答(1个)
回答1:

(1)0.75×99+0.75
=0.75×(99+1),
=75;

(2)

5
6
-(
2
3
-
1
6

=
5
6
+
1
6
-
2
3

=
1
3


(3)(8.5-4)×(0.32÷1.6)
=4.5×0.2,
=0.9;

(4)
5
6
×[1÷(
7
8
?
3
4
)]

=
5
6
×[1÷
1
8
]

=
5
6
×8

=
20
3


(5)0.925×17+9.25×8.3
=9.25×1.7+9.25×8.3,
=9.25×(1.7+8.3),
=9.25×10,
=92.5;

(6)
7
15
×
8
9
+
8
15
×
2
9

=
8
15
×
7
9
+
8
15
×
2
9

=
8
15
×(
7
9
+
2
9
)

=
8
15