分析:(1)、(2)、(3)都需要把原题进行整理,然后运用乘法的分配律进行计算即可.
(4)题需要把分数拆项直接简算;
(5)、(6)根据四则混合运算的运算顺序计算即可
(4)题需要把分数拆项直接简算;
(5)、(6)根据四则混合运算的运算顺序计算即可
解答:解:(1)3.14×43+7.2×31.4-150×0.314,
=3.14×43+72×3.14-15×3.14,
=3.14×(43+72-15),
=3.14×100,
=314;
(2)
×
+
×
,
=
×
+
×
,
=
×(
+
),
=
;
(3)2007+2008+2009+2008×97,
=2007+1+2008+2009-1+2008×97,
=2008×3+2008×97,
=2008×(3+97),
=200800;
(4)1-
+
-
+
,
=1-(
+
)+
+
-(
+
)+
+
,
=1-
-
+
+
-
-
+
+
,
=
+
,
=
;
(5)4.1-2.56÷(0.18+0.62)
=4.1-2.56÷0.8,
=4.1-3.2,
=0.9;
(6)
-
×
+
÷
,
=
-
+
,
=
-
+
,
=
,
=1
;
=3.14×43+72×3.14-15×3.14,
=3.14×(43+72-15),
=3.14×100,
=314;
(2)
5 |
9 |
15 |
23 |
8 |
9 |
5 |
23 |
=
5 |
9 |
15 |
23 |
5 |
9 |
8 |
23 |
=
5 |
9 |
15 |
23 |
8 |
23 |
=
5 |
9 |
(3)2007+2008+2009+2008×97,
=2007+1+2008+2009-1+2008×97,
=2008×3+2008×97,
=2008×(3+97),
=200800;
(4)1-
5 |
6 |
7 |
12 |
9 |
20 |
11 |
30 |
=1-(
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
=1-
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
=
1 |
2 |
1 |
6 |
=
2 |
3 |
(5)4.1-2.56÷(0.18+0.62)
=4.1-2.56÷0.8,
=4.1-3.2,
=0.9;
(6)
2 |
3 |
3 |
4 |
4 |
11 |
1 |
3 |
3 |
7 |
=
2 |
3 |
3 |
11 |
7 |
9 |
=
66 |
99 |
27 |
99 |
77 |
99 |
=
116 |
99 |
=1
17 |
99 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.