Question

1.7-(4.875-2.75)×80% 简便运算？

Answer 1

1.7-(4.875-2.75)×80%
=1.7-2.125x0.8
=1.7-2.125x（1-0.2）
=1.7-2.125+0.425
=2.125-2.125
=0

Answer 2

1.7-（4.875-2.75）×80%的简便运算，过程有：
1.7-（4.875-2.75）×80%
=1.7-2.215×80%
=1.7-1.7
=0

Answer 3

1.7-（4.875-2.75）80%
=1.7-（4+0.8+0.07+0.005-2-0.7-0.05）80%
=1.7-（〔（4-2）+（0.8-0.7）+（0.07-0.05+0.005）〕80%
=1.7-〔2+0.1+0.025〕80%
=1.7-2.125*80%
=1.7-（2+0.125）0.8
=1.7-1.6-0.1
=0
这样就简便点

Answer 4

算式1.7-（4.875-2.75）×80%的简便计算，操作如下：
1.7-（4.875-2.75）×80%
=1.7-2.125×80%
=1.7-1.7
=0

Answer 5

1.7-(4.875-2.75)*80/100
=1.7-2.125*80/100
=1.7-17/8*4/5
=1.7-17/10
=0