23.4×99+2.34
=23.4×(100-1)+2.34
=23.4×100-1×23.4+2.34
=2340-23.4+2.34
=2316.6+2.34
=2318.94
原式
=23.4×(100-1)+2.34
=23.4×100-1×23.4+2.34
=2340-23.4+2.34
=2316.6+2.34
=2318.94
2.34×99+2.34简便计算怎么解?
23.4×99+23.4
=23.4×(100-1)+23.4
=23.4×(100-1+1)
=23.4×100
=2340