1.25*3.2*2.5
=(1.25*0.8)*(4*2.5)
=1*10
=10
20分之9/[2分之3*(0.4+5分之4)]
=9/20÷[3/2*1.2]
=9/20÷1.8
=1/4
(7分之3+5分之3)*7+5分之4
=3/7*7+3/5*7+4/5
=3+(21/5+4/5)
=3+5
=8
7-6分之1*4分之1-8分之7
=7-1/24-7/8
=7-(1/24+7/8)
=7-11/12
=6又1/12
1.25*3.2*2.5
=(1.25*0.8)*(4*2.5)
=1*10
=10
20分之9/[2分之3*(0.4+5分之4)]
=9/20÷[3/2*1.2]
=9/20÷1.8
=1/4
(7分之3+5分之3)*7+5分之4
=3/7*7+3/5*7+4/5
=3+(21/5+4/5)
=3+5
=8
7-6分之1*4分之1-8分之7
=7-1/24-7/8
=7-(1/24+7/8)
=7-11/12
=6又1/12