1.(-3/4)×(-1又1/2)÷(2又1/4)
问题描述:
1.(-3/4)×(-1又1/2)÷(2又1/4)
答
(-3/4)×(-1又1/2)÷(2又1/4)
=(-3/4)×(-3/2)÷(9/4) 化成假分数
=(-3/4)×(-3/2)×(4/9) 除变乘 ,然后确定符号,负负等正,约分
=1/2
答
(-3/4) ×(-1又1/2)中“负负的正”,所以符号为正,所以为3/4 ×(1又1/2)=3/4 ×3/2=9/8,
然后用9/8÷ (2又1/4)=9/8÷ 9/4=9/8×4/9=1/2
亲,满意请采纳
答
(-3/4)×(-1又1/2)÷(2又1/4)
=(-3/4)×(-3/2)÷9/4
=-9/8×4/9
=-1/2