您好:
1÷(1-75%)
=1÷25%
=4
200×(1+20%)
=200x1.2
=240
75%×7分之5×3分之4
=3/4x4/3x5/7
=1x5/7
=5/7
0.8×99+0.8
=0.8x(99+1)
=0.8x100
=80
不明白,可以追问
如有帮助,记得采纳,谢谢
祝学习进步!
1÷(1-75%)
=1÷0.25
=4
200×(1+20%)
=200×1.2
=240
75%×7分之5×3分之4
=3/4×4/3×5/7
=1×5/7
=5/7 (7分之5 )
0.8×99+0.8
=0.8×(99+1)
=0.8×100
=80
如果帮到你,请记得采纳,O(∩_∩)O谢谢
这个很容易 把我设为最佳答案之后我再教你怎么算