计算:(1)-52+(-312)2-(-2)3+|-4|;(2)-42×[(?14)2?12÷(?2)2];(3)|-79|÷(23-15)-13×(?4
计算:(1)-52+(-312)2-(-2)3+|-4|;(2)-42×[(?14)2?12÷(?2)2];(3)|-79|÷(23-15)-13×(?4)2;(4)-2...
计算:(1)-52+(-312)2-(-2)3+|-4|;(2)-42×[(?14)2?12÷(?2)2];(3)|-79|÷(23-15)-13×(?4)2;(4)-22÷43-[22-(1-12×13)]×12.
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桞鏸JE76
2014-11-19
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(1)-5
2+(-3
)
2-(-2)
3+|-4|
=-25+12.25+8+4
=-25+24.25
=-0.75;
(2)-4
2×
[(?)2?÷(?2)2]=-16×[
-
÷4]
=-16×[
-
]
=16×
=1;
(3)|-
|÷(
-
)-
×(?4)2;
=
÷
-
×16
=
-
=-
;
(4)-2
2÷-[2
2-(1-
×
)]×12
=-4÷
-[4-(1-
)]×12
=-3-[4-
]×12
=-3-
×12
=-3-38
=-41.
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