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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)
-(
)0+0.25
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
-(
)0+0.25
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
3 (-4)3 3 (-4)3 3 (-4)3 )3)33
)0+0.25
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
1 2 1 1 2 2 0
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
×(
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
1 2 1 1 2 2
)-4-sin270°+tan15°
(2)log3
+lg25+2lg2+7 3log72+
.
-1
-1 -1
2 2 2 -4
3
+lg25+2lg2+7 3log72+
.
27 27 27 3log72+
. 3log72+
. 3log72+
.3log72+
.g72+
.g72+
.72+
.
.
lg4+lg3 1+
lg0.36+
lg8 lg4+lg3 lg4+lg3 1+
lg0.36+
lg8 1+
lg0.36+
lg8
1 2 1 1 2 2
1 3 1 1 3 3
(1)
3 | (-4)3 |
1 |
2 |
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
3 | (-4)3 |
1 |
2 |
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
3 | (-4)3 |
1 |
2 |
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
1 |
2 |
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
1 |
2 |
-1 | ||
|
(2)log3
27 |
lg4+lg3 | ||||
1+
|
-1 | ||
|
2 |
2 |
2 |
2 |
3
27 |
lg4+lg3 | ||||
1+
|
27 |
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
lg4+lg3 | ||||
1+
|
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
▼优质解答
答案和解析
(1)
-(
)0+0.25
×(
)-4-sin270°+tan15°
=-4-1+
×(
)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
3 (-4)3 3 (-4)3 3 3(-4)3 (-4)33 -(
)0+0.25
×(
)-4-sin270°+tan15°
=-4-1+
×(
)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
1 2 1 1 12 2 2)00+0.25
×(
)-4-sin270°+tan15°
=-4-1+
×(
)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
×(
)-4-sin270°+tan15°
=-4-1+
×(
)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
1 2 1 1 12 2 2×(
)-4-sin270°+tan15°
=-4-1+
×(
)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
-1
-1 -1 -1
2 2 2 2)-4-4-sin270°+tan15°
=-4-1+
×(
)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
1 2 1 1 12 2 2×(
2 2 2 2)4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分) 4+1+tan(45°-30°)
=-5+2+1+
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
tan45°+tan30° 1-tan45°tan30° tan45°+tan30° tan45°+tan30° tan45°+tan30°1-tan45°tan30° 1-tan45°tan30° 1-tan45°tan30°
=-2+2-
=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
3 3 3 3=-
…..(6分)
(2)log3
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分) -
3 3 3 3 …..(6分)
(2)log33
+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分)
27 27 27 27+lg25+2lg2+7 3log72+
=
+2+8+
=
+2+8+1=
…..(12分) 3log72+
=
+2+8+
=
+2+8+1=
…..(12分) 3log72+
=
+2+8+
=
+2+8+1=
…..(12分) 72+
=
+2+8+
=
+2+8+1=
…..(12分)
lg4+lg3 1+
lg0.36+
lg8 lg4+lg3 lg4+lg3 lg4+lg31+
lg0.36+
lg8 1+
lg0.36+
lg8 1+
1 2 1 1 12 2 2lg0.36+
1 3 1 1 13 3 3lg8
=
+2+8+
=
+2+8+1=
…..(12分)
3 2 3 3 32 2 2+2+8+
=
+2+8+1=
…..(12分)
lg12 lg(10×0.6×2) lg12 lg12 lg12lg(10×0.6×2) lg(10×0.6×2) lg(10×0.6×2)=
+2+8+1=
…..(12分)
3 2 3 3 32 2 2+2+8+1=
…..(12分)
25 2 25 25 252 2 2…..(12分)
3 | (-4)3 |
1 |
2 |
1 |
2 |
-1 | ||
|
=-4-1+
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
3 | (-4)3 |
1 |
2 |
1 |
2 |
-1 | ||
|
=-4-1+
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
1 |
2 |
1 |
2 |
-1 | ||
|
=-4-1+
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
1 |
2 |
-1 | ||
|
=-4-1+
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
1 |
2 |
-1 | ||
|
=-4-1+
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
-1 | ||
|
2 |
2 |
2 |
2 |
=-4-1+
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
1 |
2 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
=-5+2+1+
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
tan45°+tan30° |
1-tan45°tan30° |
=-2+2-
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
3 |
3 |
(2)log3
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
3 |
(2)log33
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
27 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
lg4+lg3 | ||||
1+
|
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
lg4+lg3 | ||||
1+
|
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
=
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
3 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
lg12 |
lg(10×0.6×2) |
3 |
2 |
25 |
2 |
3 |
2 |
25 |
2 |
25 |
2 |
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