算簡30÷25÷4(5/4-1/3)÷1/8+1/7 5/9*13/17+4/9÷17/13

算簡30÷25÷4(5/4-1/3)÷1/8+1/7 5/9*13/17+4/9÷17/13


30÷25÷4
=30÷(25×4)
=30÷100
=0.3
(5/4-1/3)÷1/8+1/7
= 11/12×8+1/7
=22/3+1/7
=7又10/21
5/9*13/17+4/9÷17/13
=5/9×13/17+4/9×13/17
=13/17×(5/9+4/9)
=13/17×1
=13/17



能簡算的要簡算.1/5÷6/25-2/7×7/8


1/5÷6/25-2/7×7/8
=1/5×25/6-1/4
=5/6-1/4
=10/12-3/12
=7/12



7/17*7/17+7/17*10/17簡算


7/17×7/17+7/17×10/17
=(7/17+10/17)×7/17
=1×7/17
=7/17



11.7+二十分之十七+8.3+十分之一簡算


(11.7+8.3)+(17/20+2/20)=20.95