
计算:(1)0-(+8)+(-2.7)-(+5);(2)-3.92+6.24-8.56+4.28;(3)0.25+112+(?23)?14?512;(4)?
计算:(1)0-(+8)+(-2.7)-(+5);(2)-3.92+6.24-8.56+4.28;(3)0.25+112+(?23)?14?512;(4)?56?3.74...
计算:(1)0-(+8)+(-2.7)-(+5);(2)-3.92+6.24-8.56+4.28;(3)0.25+112+(?23)?14?512;(4)?56?3.74?(?3.74)+56+17.8.
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(1)原式=0-8-2.7-5,
=-15.7;
(2)原式=(6.24+4.28)-(3.92+8.56),
=10.52-12.48,
=-1.96;
(3)原式=(
-
)+(
-
-
),
=-1;
(4)原式=(-
+
)+(-3.74+3.74)+17.8,
=17.8.
=-15.7;
(2)原式=(6.24+4.28)-(3.92+8.56),
=10.52-12.48,
=-1.96;
(3)原式=(
1 |
4 |
1 |
4 |
1 |
12 |
5 |
12 |
2 |
3 |
=-1;
(4)原式=(-
5 |
6 |
5 |
6 |
=17.8.
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