问题 解答题
计算下列各题.(能简算的要简算)
3.6-2.84+7.4-7.2
(4-0.2)÷1.9+0.1
4
29
×[1-(
3
4
-
3
8
)]

8
17
÷23+
1
23
×
9
17
答案

(1)3.6-2.84+7.4-7.2,

=(3.6+7.4)-(2.84+7.2),

=11-10.04,

=0.96;

(2)(4-0.2)÷1.9+0.1,

=3.8÷1.9+0.1,

=2+0.1,

=2.1;

(3)

4
29
×[1-(
3
4
-
3
8
)],

=

4
29
×[1-
3
8
],

=

4
29
×
5
8

=

5
58

(4)

8
17
÷23+
1
23
×
9
17

=

8
17
×
1
23
+
1
23
×
9
17

=(

8
17
+
9
17
)×
1
23

=1×

1
23

=

1
23

单项选择题
单项选择题