(-2/3)×(+1又1/3)×(-1-1/4)怎么写?
问题描述:
(-2/3)×(+1又1/3)×(-1-1/4)怎么写?
答
分数间的乘方通常先算括号内的,把带分数化成假分数再计算
(-2/3)×(+1又1/3)×(-1-1/4)
=(-2/3)×(4/3)×(-5/4)
=(8/9) ×(5/4)
=10/9