计算,能简算的要简算!六年级的,要有过程

问题描述:

计算,能简算的要简算!六年级的,要有过程
(1)2-11分之4÷55分之44-6分之1
(2)5分之4×7分之4+5分之1÷4分之7
(3)4÷9分之4-9分之4÷4

2-4/11÷44/55-1/6
=2-4/11×55/44-1/6
=2-4/11×5/4-1/6
=2-5/11-1/6
=91/66=1又25/66
4/5×4/7+1/5÷7/4
=4/5×4/7+1/5×4/7
=(4/5+1/5)×4/7
=1×4/7
=4/7
4÷4/9-4/9÷4
=4×9/4-4/9×1/4
=9-1/9
=8又8/9