题目内容

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
.

(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
.
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