谁能帮我出21道3个数的分数乘法计算题及答案,100道乘法计算题三年级及答案

(1/3)*(1/4)*(1/5)=1/60

(1/2)*(2/3)*(3/4)=1/4

(1/√2)*(√2/2)*(2/3)=1/3

(√17+√19)/(√2+√3)*(√17-√19)/(√3-√2)*(-2)/(3^3)=4/27

(7!/8!)*(4!/3!)*(5!/6!)=1/12