计算(1)(-2)2-|-7|+3-2×(-12);(2)-36×(19-16-118);(3)-16-(1-0.5)×13×[2-(-3)2];
计算(1)(-2)2-|-7|+3-2×(-12);(2)-36×(19-16-118);(3)-16-(1-0.5)×13×[2-(-3)2];(4)(-3)2008×...
计算(1)(-2)2-|-7|+3-2×(-12);(2)-36×(19-16-118);(3)-16-(1-0.5)×13×[2-(-3)2];(4)(-3)2008×(13)2009-12008-(-1)2008.
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寻生想5411
2014-12-14
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(1)(-2)
2-|-7|+3-2×(-
)
=4-7+3+1
=8-7
=1;
(2)-36×(
-
-
)
=
×(-36)-
×(-36)-
×(-36)
=-4+6+2
=-4+8
=4;
(3)-1
6-(1-0.5)×
×[2-(-3)
2]
=-1-
×
×(2-9)
=-1+
=
;
(4)(-3)
2008×
()2009-1
2008-(-1)
2008=(-3)
2008×
()2008×
-1-1
=
(?3×)2008×
-2
=
-2
=-
.
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