计算要过程:(-8⼀9)×(-0.25)×(-1⼀4)×9=? (1又3⼀4-0.875-7⼀12)×(-1又1⼀7)=?

(-5)×(-7/9)×(-0.8)×(2又1/4)×(-1/7)=?
2024-12-05 05:49:37
推荐回答(1个)
回答1:

(-8/9)×(-0.25)×(-1/4)×9
=(-8/9)*9*(-0.25)*(-1/4)
=(-1)*1
=-1

(1又3/4-0.875-7/12)×(-1又1/7)
=(7/4-7/8-7/12)*(-8/7)
打开=(-2)+1+3/4
=-1/4
(-5)×(-7/9)×(-0.8)×(2又1/4)×(-1/7)
=[(-5)*(-0.8)]*[(-7/9)*(-1/7)]*(9/4)
=4*(1/9)*(9/4)
=1