2个回答
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-7-(-1)+6+(-2) (-3)×2÷(-1/4) (-1/2+2/5-1/4)×(-24)=-403.2
(-3)*(-9)-8*(-5) = 67
(-3)*(-9)-8*(-5) = 67
追问
一共是4个式子。 而且还要过程哦。
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展开全部
-7-(-1)+6+(-2)
=-7+1+6-2
=-2
(-3)×2÷(-1/4)
=(-3)×2×(-4)
=24
(-1/2+2/5-1/4)×(-24)
=12-48/5+6
=18-48/5
=90/5-48/5
=42/5
(-3)×(-9)-8×(-5)
=27-(-40)
=27+40
=67
=-7+1+6-2
=-2
(-3)×2÷(-1/4)
=(-3)×2×(-4)
=24
(-1/2+2/5-1/4)×(-24)
=12-48/5+6
=18-48/5
=90/5-48/5
=42/5
(-3)×(-9)-8×(-5)
=27-(-40)
=27+40
=67
追问
-2³-3×(-2)³-(-1)④ ④在(-1)上面 帮忙解一下。谢谢哈。还有这个 (-1/2+2/5-1/4)×(-24)
=12-48/5+6
=18-48/5
=90/5-48/5
=42/5
没看懂、。、、
追答
(-1/2+2/5-1/4)×(-24)
=12-48/5+6
=18-48/5
=90/5-48/5
=42/5
这个是-24和前三项分别相乘后再相加
-2^3-3×(-2)^3-(-1)^4
=-8-3×8-1
=-33
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