8-2^3÷(-4)×(-2)=?

来源:百度知道 编辑:UC知道 时间:2024/06/12 11:52:51
1. 8-2^3÷(-4)×(-2)=?
2. (-5)^3×[2-(-6)]-300÷5
3. -1-(1-0.5)×1÷3×[2-(-3)^2]

要过程啊

1. 8-2^3÷(-4)×(-2)=8-8 ÷4×2=8-2×2=8-4=4
2. (-5)^3×[2-(-6)]-300÷5 =-125×8-60=-1000-60=-1060
3. -1-(1-0.5)×1÷3×[2-(-3)^2] =-1-0.5×1÷3×[2-9]
=-1-0.5÷3×(-7)
=-1+7/6
=1/6

2^3=8. 答案为7

(-5)^3=-125. -125×8-60=-1060

-1-0.5÷3×(-7)=1/6

1. 8-2^3÷(-4)×(-2)=8-8÷(-4)×(-2)=8-(-2)×(-2)=8-4=4

2. (-5)^3×[2-(-6)]-300÷5=(-125)×(2+6)-60=(-125)×8-60=-1000-60=-1060

3. -1-(1-0.5)×1÷3×[2-(-3)^2]=-1-0.5×1÷3×(2+8)=-1-0.5×1÷3×10=-1-0.5÷3×10=-1-1/6×10=-1-1/60=-61/60