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计算下列各式的值:(1)3(-4)3-(12)0+0.2512×(-12)-4-sin270°+tan15°(2)log327+lg25+2lg2+73log72+lg4+lg31+12lg0.36+13lg8.

题目详情
计算下列各式的值:
(1)
3(-4)3
-(
1
2
0+0.25 
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

3(-4)3
-(
1
2
0+0.25 
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
3(-4)3
3(-4)3
3(-4)33(-4)3)3)33
1
2
0+0.25 
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
1
2
1211220 
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
 
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
 
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
1
2
×(
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
1
2
121122
-1
2
-4-sin270°+tan15°
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
-1
2
-1
2
-1-1
2
2
2
2
2
2-4
3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
27
27
27
27 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
g72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
g72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
lg4+lg31+
1
2
lg0.36+
1
3
lg8lg4+lg3lg4+lg31+
1
2
lg0.36+
1
3
lg81+
1
2
lg0.36+
1
3
lg8
1
2
121122
1
3
131133
▼优质解答
答案和解析
(1)
3(-4)3
-(
1
2
0+0.25 
1
2
×(
-1
2
-4-sin270°+tan15°
=-4-1+
1
2
×(
2
)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
3(-4)3
3(-4)3
3(-4)333(-4)3(-4)33
-(
1
2
0+0.25 
1
2
×(
-1
2
-4-sin270°+tan15°
=-4-1+
1
2
×(
2
)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
1
2
12111222)00+0.25 
1
2
×(
-1
2
-4-sin270°+tan15°
=-4-1+
1
2
×(
2
)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
 
1
2
×(
-1
2
-4-sin270°+tan15°
=-4-1+
1
2
×(
2
)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
1
2
12111222×(
-1
2
-4-sin270°+tan15°
=-4-1+
1
2
×(
2
)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
-1
2
-1
2
-1-1-1
2
2
2
2
2
22)-4-4-sin270°+tan15°
=-4-1+
1
2
×(
2
)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
1
2
12111222×(
2
2
2
22)4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
4+1+tan(45°-30°)
=-5+2+1+
tan45°+tan30°
1-tan45°tan30°

=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
tan45°+tan30°
1-tan45°tan30°
tan45°+tan30°1-tan45°tan30°tan45°+tan30°tan45°+tan30°tan45°+tan30°1-tan45°tan30°1-tan45°tan30°1-tan45°tan30°
=-2+2-
3
=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
3
3
3
33=-
3
 …..(6分)
(2)log3
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
-
3
3
3
33 …..(6分)
(2)log33
27
+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
27
27
27
2727+lg25+2lg2+7 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
 3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
3log72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
72+
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8

=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
lg4+lg3
1+
1
2
lg0.36+
1
3
lg8
lg4+lg31+
1
2
lg0.36+
1
3
lg8lg4+lg3lg4+lg3lg4+lg31+
1
2
lg0.36+
1
3
lg81+
1
2
lg0.36+
1
3
lg81+
1
2
12111222lg0.36+
1
3
13111333lg8
=
3
2
+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
3
2
32333222+2+8+
lg12
lg(10×0.6×2)
=
3
2
+2+8+1=
25
2
…..(12分)
lg12
lg(10×0.6×2)
lg12lg(10×0.6×2)lg12lg12lg12lg(10×0.6×2)lg(10×0.6×2)lg(10×0.6×2)=
3
2
+2+8+1=
25
2
…..(12分)
3
2
32333222+2+8+1=
25
2
…..(12分)
25
2
252252525222…..(12分)