Question

1/4×(4.85÷5/18-3.6+6.15×3又3/5)÷[1.75×（1又2/3+19/21）]简便计算

Answer 1

1/4*(4.85*3.6-3.6+6.15*3.6)/[1.75*(5/3+19/21)]
=1/4*3.6(4.85-1+6.15)/[7/4*(35/21+19/21)]
=0.9*10/(7/4*54/21)
=9/(9/2)
=2

Answer 2

1/4×(4.85÷5/18-3.6+6.15×3又3/5)÷[1.75×(1又2/3+19/21)]
=1/4×(4.85×18/5-3.6+6.15×18/5)÷[1.75×(5/3+19/21)]
=1/4×(17.46-3.6+22.14)÷[1.75×54/21]
=(1/4×36)÷(94.5/21)
=9÷94.5/21
=189/94.5
=2

Answer 3