9/14-5/12+5/14+7/12簡算

9/14-5/12+5/14+7/12簡算


9/14-5/12+5/14+7/12
=(9/14+5/14)+(7/12-5/12)
=1+1/6
=7/6(或1又1/6)



(11分之4*17分之1)*11+11分之6用簡算


4/11*1/17*11+6/11
=4/17+6/11
=146/187



(4/11+1/17)*11+6/17(簡算)


(4/11+1/17)*11+6/17
=4/11*11+1/17*11+6/17
=4+(11/17+6/17)
=4+1
=5



【簡算】(3/4-2/3)÷1/5 4/5×7/8+7/8÷5(1-8/15×3/4)÷3/5(3/8+2/17)×8+1/17


(3/4-2/3)÷1/5
=1/12ch35
=5/12
4/5×7/8+7/8÷5
=(4/5+1/50×7/8
=1×7/8
=7/8
(1-8/15×3/4)÷3/5
=(1-2/5)×5/3
=3/5×5/3
=1
(3/8+2/17)×8+1/17
=3/8×8+(16/17+1/17)
=3+1
=4