简便计算 4.8×1.01 7.5×99.9

简便计算 4.8×1.01 7.5×99.9
简便计算 4.8×1.01 7.5×99.9

简便计算 4.8×1.01 7.5×99.9
4.8×1.01
=4.8x(1+0.01)
=4.8x1+4.8x0.01
=4.848
7.5×99.9
=7.5x(100-0.1)
=7.5x100-7.5x0.1
=750-0.75
=749.25

4.8+0.048=4.848
7.5*100-0.75=749.25

楼主，请问算式中间是加号吗？
如果是，如下
4.8×1.01
=4.8x(1+0.01)
=4.8x1+4.8x0.01
=4.848
7.5×99.9
=7.5x(100-0.1)
=7.5x100-7.5x0.1
=750-0.75
=749.25