请帮忙做一道初一计算题
题目:(-1)的3次方-(1-0.5)/{1/3*[2-(-3)的2次方]} 请帮忙具体计算一下
上面回答都是错的。 (-1)的3次方-(1-0.5)/{1/3*[2-(-3)的二次方]} =(-1)-0.5/{1/3*-7} =(-1)-0.5/-7/3 =(-1)-3/14 =11/14
恩,做的不错啊
宿命的风 谦虚!
(-1)^3-(1-0.5)/{1/3*[2-(-3)^2]} = (-1)-0.5/{1/3*[2-9]} = (-1)-0.5/{1/3*[-7]} = (-1)-0.5/{1/[-21]} = (-1)-(0.5)/{-1/21} = (-1)-(0.5)*{-21} = (-1)-(-10.5) = (-1)+10.5 = 9.5 最后答案好像是9.5 (多年不算生疏了,步骤是对的,结果可能对吧~~)
=-1-{0.5/[1/(-21)]} =-1-[0.5*(-21)] =-1+10.5 =9.5
答:72°35'/2=36°17.5'=36°17'30'' 18°33'*4=72°132'=72°+2°12'=74°12' 所以和=110°29'30''详情>>
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