提问有一组互相咬合的齿轮,小齿轮有28个,是大齿轮的5分之一.大齿轮有多少个齿?大齿轮没分钟转80周,比小齿轮每分钟转的周数少5分之4.小齿轮每分钟转多少周
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提问有一组互相咬合的齿轮,小齿轮有28个,是大齿轮的5分之一.大齿轮有多少个齿?大齿轮没分钟转80周,比小齿轮每分钟转的周数少5分之4.小齿轮每分钟转多少周
提问有一组互相咬合的齿轮,小齿轮有28个,是大齿轮的5分之一.大齿轮有多少个齿?
大齿轮没分钟转80周,比小齿轮每分钟转的周数少5分之4.小齿轮每分钟转多少周
提问有一组互相咬合的齿轮,小齿轮有28个,是大齿轮的5分之一.大齿轮有多少个齿?大齿轮没分钟转80周,比小齿轮每分钟转的周数少5分之4.小齿轮每分钟转多少周
在齿轮传动时,相互啮合的大,小齿轮总是一个齿一个齿地互相咬合,因此大齿轮的齿数Z=28*5=140.转速与齿数成反比,因此小齿轮每分钟转400周.
我写的是方程的。
第一个问题;解;设大齿轮有x个。5分之1x=28 x=28÷5分之1 x=140
第二个问题;解;设小齿轮每分钟转x圈 x-5分之4=80 (1-5分之4)x=80 5分之1=80 x=400(希望能帮到你)
1、28×5=140(个) 2、80 ÷(1-4/5)=400 ( 周 )
1、28×5=140(个) 2、80÷(1-五分之四)=80÷五分之四=400(个)
x4/5=80
我写的是方程的。第一个问题;解;设大齿轮有x个。5分之1x=28 x=28÷5分之1 x=140 第二个问题;解;设小齿轮每分钟转x圈。 x-5分之4=80 (1-5分之4)x=80 5分之1=80 x=400(希望能帮到你)
在齿轮传动时,相互啮合的大,小齿轮总是一个齿一个齿地互相咬合,因此大齿轮的齿数Z=28*5=140。转速与齿数成反比,因此小齿轮每分钟转400周
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1、28×5=140(个) 2、80×(1-4/5)=400(个)
28除以5分之1 等于140 大齿轮的
80÷5/4
=80×4/5
=100(周)
28除以五分之一等于140个
28/1/5=140
28呈5分之1=140
28除以5分之1 等于140 。
大齿轮齿数:28×5=140
小齿轮每分钟转:80×5=400周
1、28÷5分之1=140(个)
2、80乘(1减五分之四)=400(周)
28÷5分之1 80×(1-5分之4)
=28×5 =80×5分之1
=140个 =16
参考资料:自己想的
把小齿轮看做单位1
则大齿轮是1-4/5=1/5
大齿轮是80周
80÷(1-4/5)=400
答:小齿轮每分钟转400周.
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