初一数学填空题和计算题(过程要写清).
问题描述:
初一数学填空题和计算题(过程要写清).
1/4-2/15+2/3+1/5-5/6-3/4
答
1/4-2/15+2/3+1/5-5/6-3/4
=(1/5-2/15)+(1/4-3/4)+(2/3-5/6)
=1/15-(1/2+1/6)
=1/15-2/3
=-9/15
=-2/3