1.(-3)³+5²-(-2)² 2.-8÷(-4又2分之1)÷(-2又3分之2)
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![1.(-3)³+5²-(-2)² 2.-8÷(-4又2分之1)÷(-2又3分之2)](/uploads/image/z/188100-36-0.jpg?t=1.%EF%BC%88-3%EF%BC%89%26%23179%3B%2B5%26%23178%3B-%EF%BC%88-2%EF%BC%89%26%23178%3B+2.-8%C3%B7%EF%BC%88-4%E5%8F%882%E5%88%86%E4%B9%8B1%EF%BC%89%C3%B7%EF%BC%88-2%E5%8F%883%E5%88%86%E4%B9%8B2%EF%BC%89)
1.(-3)³+5²-(-2)² 2.-8÷(-4又2分之1)÷(-2又3分之2)
1.(-3)³+5²-(-2)² 2.-8÷(-4又2分之1)÷(-2又3分之2)
1.(-3)³+5²-(-2)² 2.-8÷(-4又2分之1)÷(-2又3分之2)
(-3)³+5²-(-2)²
=-27+25-4
=25-(27+4)
=25-31
=-6
-8÷(-4又1/2)÷(-2又2/3)
=-8÷(-9/2)÷(-8/3)
=-8×(-2/9)×(-3/8)
=-(8×2/9×3/8)
=-2/3