早教吧作业答案频道 -->数学-->
(-3/4)*(-3/2)÷(-9/4)(-2/9)*3/2÷1/3÷(-0.5)(-257)÷(-1/3)-257÷(-1/5)+257÷0.5(7/3-7/2+49/45)÷(-7/6)
题目详情
(-3/4)*(-3/2)÷(-9/4) (-2/9)*3/2÷1/3÷(-0.5)
(-257)÷(-1/3)-257÷(-1/5)+257÷0.5
(7/3-7/2+49/45)÷(-7/6)
(-257)÷(-1/3)-257÷(-1/5)+257÷0.5
(7/3-7/2+49/45)÷(-7/6)
▼优质解答
答案和解析
1:(-3/4)*(-3/2)÷(-9/4)
=(-3/4)/(-9/4)*(-3/2)
=1/3*(-3/2)
=-1/2
2:(-2/9)*3/2÷1/3÷(-0.5)
=-1/3/1/3/(-0.5)
=-1/(-0.5)
=2
3:(-257)÷(-1/3)-257÷(-1/5)+257÷0.5
=(-257)[1/(-1/3)+1/(-1/5)-1/0.5]
=(-257)*(-10)
=2570
4:(7/3-7/2+49/45)÷(-7/6)
=(7/3)/(-7/6)-(7/2)/(-7/6)+(49/45)/(-7/6)
=-2+3-14/15
=1/15
=(-3/4)/(-9/4)*(-3/2)
=1/3*(-3/2)
=-1/2
2:(-2/9)*3/2÷1/3÷(-0.5)
=-1/3/1/3/(-0.5)
=-1/(-0.5)
=2
3:(-257)÷(-1/3)-257÷(-1/5)+257÷0.5
=(-257)[1/(-1/3)+1/(-1/5)-1/0.5]
=(-257)*(-10)
=2570
4:(7/3-7/2+49/45)÷(-7/6)
=(7/3)/(-7/6)-(7/2)/(-7/6)+(49/45)/(-7/6)
=-2+3-14/15
=1/15
看了 (-3/4)*(-3/2)÷...的网友还看了以下: