(1) (-3又3分之1)÷2又5分之4÷(-3又8分之1)÷(-0.75) (2) (-22.5)÷(-18)÷(-0.25)计算
问题描述:
(1) (-3又3分之1)÷2又5分之4÷(-3又8分之1)÷(-0.75) (2) (-22.5)÷(-18)÷(-0.25)
计算
答
(1)(-3又3分之1)÷2又5分之4÷(-3又8分之1)÷(-0.75)
=(-10/3)÷(14/5)÷(-25/3)÷(-0.75)
=(-10/3) x (5/14) x (-3/25) x (4/3)
=2x4÷(3*14)
= 4/21
(2) (-22.5)÷(-18)÷(-0.25)
=(-45/2)÷(-18)÷(-1/4)
=45/2 x 1/18 x4
=5*9*4/(4*9)
=5
答
(1) (-3又3分之1)÷2又5分之4÷(-3又8分之1)÷(-0.75)
=10/3÷14/5÷25/8÷3/4
=25/21÷25/8÷3/4
=8/21÷3/4
=32/63
(2) (-22.5)÷(-18)÷(-0.25)
=-22.5÷18÷0.25
=-1.25÷0.25
=-5