計算:15分之6*101-15分之8,7分之3除以(5分之8*8分之5-4分之1),(6分之5+8分之3+4分之3+3分之1)*2.4

計算:15分之6*101-15分之8,7分之3除以(5分之8*8分之5-4分之1),(6分之5+8分之3+4分之3+3分之1)*2.4


6/15*101-8/15=6/15*101-6/15-2/15=6/15*(101-1)-2/15=2/5*100-2/15=40-2/15=39又13/153/7÷(8/5*5/8-1/4)=3/7÷(1-1/4)=3/7÷3/4=3/7×4/3=4/7(5/6+3/8+3/4+1/3)*2.4=0.4*5+0.3*3+0.6*3+0.8=2+0.9+1.8+0.8=…



3减2/3除以4/15减1/7


=3-2/3×15/4-1/7
=6/2-5/2-1/7
=1/2-1/7
=5/14



5/2除以5/3+【7/6-3/10】除以2/15-【5/7*1.6+1/2除以7/5】


5/2÷5/3+(7/6-3/10)÷2/15-(5/7×1.6+1/2÷7/5)
=5/2×3/5+(35/30-9/30)×15/2-(5/7×1.6+0.5×5/7)
=3/2+13/2-1.5
=13/2
=6.5



【1.9+19%乘以(4.8-2.4)】除以(53乘以0.25+30.6乘以0.25)=?


【1.9+19%乘以(4.8-2.4)】除以(53乘以0.25+30.6乘以0.25)
=【1.9*(1+0.24)】/【0.25*(53+30.6)】
=1.9*1.24/(83.6/4)
=2.356/20.9
=0.1127272727.