题目内容
计算下列各式的值
(1)(2
)
-(-9.6)0-(3
) -
+(1.5)-2
(2)3 2+log32+lg52+
lg8+lg5•lg20+lg22.
(1)(2
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 8 |
| 2 |
| 3 |
(2)3 2+log32+lg52+
| 2 |
| 3 |
(1)(2
)
-(-9.6)0-(3
) -
+(1.5)-2=(
)
-1-(
)-
+(
)-2=
-1-(
)3×(-
)+
=
-1-
+
=
.
(2))3 2+log32+lg52+
lg8+lg5•lg20+lg22=32?3log?32+2lg?5+2lg?2+lg?5(lg?5+lg?4)+lg?22
=18+2+lg25+2lg2lg5+lg22=20+(lg2+lg5)2=20+1=21.
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 8 |
| 2 |
| 3 |
| 9 |
| 4 |
| 1 |
| 2 |
| 27 |
| 8 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 9 |
| 3 |
| 2 |
| 4 |
| 9 |
| 4 |
| 9 |
| 1 |
| 2 |
(2))3 2+log32+lg52+
| 2 |
| 3 |
=18+2+lg25+2lg2lg5+lg22=20+(lg2+lg5)2=20+1=21.
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