4.68-1.3+14.14-8.7
=(4.68+14.14)-(1.3+8.7)
=18.82-10
=8.82
9分之4除以【(3分之2-9分之2)乘2分之1】
=4/9÷(2/3*1/2-2/9*1/2)
=4/9÷(1/3-1/9)
=4/9÷2/9
=4/9*9/2
=2
4.68-1.3+14.14-8.7
=(4.68+14.14)-(1.3+8.7)
=18.82-10
=8.82
9分之4除以【(3分之2-9分之2)乘2分之1】
=4/9÷(2/3*1/2-2/9*1/2)
=4/9÷(1/3-1/9)
=4/9÷2/9
=4/9*9/2
=2