2/3乘于6/7,7/10乘于6/7,14/15乘以6/7,1/8乘于24,5/12乘以24,7/20乘24.都等于多少?,

问题描述:

2/3乘于6/7,7/10乘于6/7,14/15乘以6/7,1/8乘于24,5/12乘以24,7/20乘24.都等于多少?,

4/7 3/5 28/35 3 10 42/5