计算:①(-8)-(-1)②8+(-10)+(-2)-(-5)③392324×(-12)④-24×(-12+34-13)⑤8×(-45)÷|-16|
计算:①(-8)-(-1)②8+(-10)+(-2)-(-5)③392324×(-12)④-24×(-12+34-13)⑤8×(-45)÷|-16|⑥-52-[(-2)3...
计算:①(-8)-(-1)②8+(-10)+(-2)-(-5)③392324×(-12)④-24×(-12+34-13)⑤8×(-45)÷|-16|⑥-52-[(-2)3+(1-0.8×34)×(-2)]
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58矠VN5
推荐于2016-10-26
·
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①(-8)-(-1),
=-8+1,
=-7;
②8+(-10)+(-2)-(-5),
=8-10-2+5,
=8+5-10-2,
=1;
③39
×(-12),
=(40-
)×(-12),
=-40×12+
,
=-479
;
④
-24×(-+-),
=24×
-24×
+24×
,
=12-18+8,
=2;
⑤
8×(-)÷|-16|,
=-8×
×
,
=-
;
⑥-5
2-[(-2)
3+(1-0.8×
)×(-2)],
=-25-[-8+(1-
×
)×(-2)],
=-25+8+2-
,
=-16
.
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