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能简算的要简算3001-19983.9+456+6.1+516(12+13+18)×0.245000-105×340.15÷0.25+0.75×1.2[5815+(116−0.2)×1.5]÷160.

题目详情
能简算的要简算
3001-1998 3.9+4
5
6
+6.1+5
1
6
(
1
2
+
1
3
+
1
8
)×0.24    
5000-105×34   0.15÷0.25+0.75×1.2 [5
8
15
+(1
1
6
−0.2)×1.5]÷
1
60
▼优质解答
答案和解析
(1)3001-1998,
=(3000+1)-(2000-2),
=(3000-2000)+3,
=1003;
(2)3.9+4
5
6
+6.1+5
1
6

=(3.9+6.1)+(4
5
6
+ 5
1
6
),
=10+10,
=20;
(3)(
1
2
+
1
3
+
1
8
)×0.24,
=
1
2
×0.24+
1
3
×0.24+
1
8
×0.24,
=0.12+0.08+0.03,
=0.23;
(4)5000-105×34,
=5000-3570,
=1430;
(5)0.15÷0.25+0.75×1.2,
=0.6+0.9,
=1.5;
(6)[5
8
15
+( 1
1
6
−0.2)× 1.5]÷
1
60

=[5
8
15
+
29
30
×1.5]÷
1
60

=[
83
15
+
29
20
]×60,
=
83
15
×60+
29
20
×60,
=332+87,
=419.