Question

6年级不同的分数混合运算简便5O道

Answer 1

1.6份之5+3份2 =5/6+4/6 =10/6 =5/3 =1又2/3 2.6份之5-3份之2 =5/6-4/6 =1/6 3.6份之5乘3份之2 =(5/6)*(2/3) =5/9 4.6份之5除以3份之2 =(5/6)/(2/3) =(5/6)*(3/2) =5/4 =1又1/4 3.列式计算.(怎样算简便就怎样算) 1.8份之9除以5份之3除以27份之5 =(9/8)/(3/5)/(5/27) =(9/8)*(5/3)*(27/5) =81/8 =10又1/8 2.13份之8除以7+7份之1乘13份之6 =(8/13)/7+(1/7)*(6/13) =(1/7)*(8/13+6/13) =(1/7)*(14/13) =2/13 3.6乘4份之3除以4份之3乘6 =[6*(3/4)/(3/4)]*6 =6*(3/4)*(4/3)*6 =36 3.列式计算. 1.15份之2加上5份之4与3份之2的积是多少? 2/15+(4/5)*(2/3) =2/15+8/15 =10/15 =2/3 2.5份之4减3份之2的差乘一个数,等于7份之2,这个数是多少? (2/7)/(4/5-2/3) =(2/7)/(12/15-10/15) =(2/7)/(2/15) =(2/7)*(15/2) =15/7 =2又1/7 4.解下列方程. (5x/7)/(14/9)=3/7 5x/7=(3/7)*(9/14) x=7*(27/98)/5 x=27/70