2/3×5/7+2/3×2/7(简便计算) 3/4×1/9+1/4÷9(简便计算) 5-(6/7÷
问题描述:
2/3×5/7+2/3×2/7(简便计算) 3/4×1/9+1/4÷9(简便计算) 5-(6/7÷
2/3×5/7+2/3×2/7(简便计算)
3/4×1/9+1/4÷9(简便计算)
5-(6/7÷3/14+3/16)(简便计算)
答
1#
2/3(5/7+2/7)
=2/3
2#
3/4*1/9+1/4*1/9
=(3/4+1/4)*1/9
=1/9
3#
5-(6/7*14/3+3/16)
=5-4-3/16
=13/16