计算有理数混合运算2²+(-2)³×5-(-0.28)÷(-2)²=4+(-8)×5-(-0.28)×1/4=4+(-40)+0.07=-37.93上面那个不对=4+(-8)×5-(-0.28)×1/4=4+(-40)-(-0.07)=4+(-40)+0.07=-35.93
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![计算有理数混合运算2²+(-2)³×5-(-0.28)÷(-2)²=4+(-8)×5-(-0.28)×1/4=4+(-40)+0.07=-37.93上面那个不对=4+(-8)×5-(-0.28)×1/4=4+(-40)-(-0.07)=4+(-40)+0.07=-35.93](/uploads/image/z/2584256-32-6.jpg?t=%E8%AE%A1%E7%AE%97%E6%9C%89%E7%90%86%E6%95%B0%E6%B7%B7%E5%90%88%E8%BF%90%E7%AE%972%26sup2%3B%2B%28-2%29%26sup3%3B%C3%975-%28-0.28%29%C3%B7%28-2%29%26sup2%3B%3D4%2B%28-8%29%C3%975-%28-0.28%29%C3%971%2F4%3D4%2B%28-40%29%2B0.07%3D-37.93%E4%B8%8A%E9%9D%A2%E9%82%A3%E4%B8%AA%E4%B8%8D%E5%AF%B9%3D4%2B%28-8%29%C3%975-%28-0.28%29%C3%971%2F4%3D4%2B%28-40%29-%28-0.07%29%3D4%2B%28-40%29%2B0.07%3D-35.93)
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计算有理数混合运算2²+(-2)³×5-(-0.28)÷(-2)²=4+(-8)×5-(-0.28)×1/4=4+(-40)+0.07=-37.93上面那个不对=4+(-8)×5-(-0.28)×1/4=4+(-40)-(-0.07)=4+(-40)+0.07=-35.93
计算有理数混合运算
2²+(-2)³×5-(-0.28)÷(-2)²
=4+(-8)×5-(-0.28)×1/4
=4+(-40)+0.07
=-37.93
上面那个不对
=4+(-8)×5-(-0.28)×1/4
=4+(-40)-(-0.07)
=4+(-40)+0.07
=-35.93
计算有理数混合运算2²+(-2)³×5-(-0.28)÷(-2)²=4+(-8)×5-(-0.28)×1/4=4+(-40)+0.07=-37.93上面那个不对=4+(-8)×5-(-0.28)×1/4=4+(-40)-(-0.07)=4+(-40)+0.07=-35.93
步骤是对的,但是上面那个只是最后的结果有些问题,下面的结果是对的
dui