4.39+(2.01-2.29)-0.99 (3.98-2.43)-(1.43-5.57)也是这类的题目4.39+(2.01-2.29)-0.99

问题描述:

4.39+(2.01-2.29)-0.99
(3.98-2.43)-(1.43-5.57)也是这类的题目
4.39+(2.01-2.29)-0.99

3.12 还有一个是5.69, 既然不会,计算器也没有麽?

4.39+(2.01-2.29)-0.99
=4.39+2.01-2.29-0.99
=3.12
(3.98-2.43)-(1.43-5.57)
=3.98-2.43-1.43+5.57
=5.69